What is the temperature of a gas at 100 kPa if the gas had a temperature of
26°C at 200 kPa?
Answers
The temperature of the gas at 100 kPa is approximately 149.575 K.
The temperature of a gas at 100 kPa, when it initially had a temperature of 26°C at 200 kPa, can be determined using the combined gas law. The combined gas law relates the initial and final pressures, volumes, and temperatures of a gas, and can be written as:
(P1 * V1) / T1 = (P2 * V2) / T2
where P1 and P2 are the initial and final pressures, V1 and V2 are the initial and final volumes, and T1 and T2 are the initial and final temperatures.
In this case, we are given the initial pressure (P1 = 200 kPa), initial temperature (T1 = 26°C), and final pressure (P2 = 100 kPa). We can convert the initial temperature to Kelvin by adding 273.15, so T1 = 26°C + 273.15 = 299.15 K.
Since the problem does not specify any changes in volume, we can assume that the volume remains constant (V1 = V2). This simplifies the equation to:
(P1 * V) / T1 = (P2 * V) / T2
Canceling out the volume terms (V) on both sides:
P1 / T1 = P2 / T2
Now, we can solve for the final temperature, T2:
T2 = (P2 * T1) / P1
T2 = (100 kPa * 299.15 K) / 200 kPa
T2 ≈ 149.575 K
Therefore, the temperature of the gas at 100 kPa is approximately 149.575 K.
To know more about temperature, visit:
https://brainly.com/question/29133754#
#SPJ11
Related Questions
what is the formula for number of moles?
Answers
Answer:
number of moles=volume/molar volume or mass/molar mass
Answer : The formula for the number of moles formula is expressed as
Number of moles = Mass of substance / Mass of one mole
A mole is defined as the mass of the substance which consists of the equal quantity of basic units. Example atoms in 12 grams are the same as 12C. The basic units can be molecules, atoms or formula units based on the substance.
A mole fraction indicates the number of chemical elements. One mole of any substance is equal to the value of 6.023 x 1023 (Avagadro number). It can be used to measure the products obtained from the chemical reaction. The unit is denoted by mol.
A 2.3−mL volume of seawater contains about 4.0 × 10−10 g of gold. The total volume of ocean water is about 1.5 × 1021 L. Calculate the total worth of all the gold in the world's oceans if the price of gold is $21.66 per gram.
Answers
Answer:
About $5.65x10^15 or $5,650,000,000,000,000
Explanation:
Given:
Volume of seawater: 2.3 mL
Grams of gold: 4.0 x 10^-10
Total volume of the ocean: 1.5 x 10^21
Price of gold: $21.66/g
Need:
1000 mL = 1 L
Find:
Dollar worth of all the gold in the world's oceans
Steps:
1. We know that there is 4.0 x 10^10 g of gold in 2.3 mL of seawater, therefore we can write it like this:
\(\frac{4.0 * 10^{-10}g}{2.3 mL}\)2. In order to find the amount of gold in the entire ocean we need to cancel out the 2.3 mL of seawater on the bottom. To do this we will use the volume of the entire ocean (1.5 x 10^21 L). Before we plug it into the equation, we have to match the units of the mL and the L. We will use the 1000mL = 1 L to accomplish this. The formula should now look like this:
\(\frac{4.0*10^{-10}g }{2.3mL} \frac{1000mL}{1L} \frac{1.5*10^{21}L}{1}\)
3. Solve the equation to find the amount of gold in all the oceans:
\(\frac{4.0*10^{-10}g }{2.3mL} \frac{1000mL}{1L} \frac{1.5*10^{21}L}{1} = 2.61 x 10^{14} g\)
4. Now since we found the amount of gold in all the oceans we can use this to find the total worth of all of it. We can do this by multiplying all the grams of the gold by the price of gold per gram. It can be represented like this:
\(\frac{21.66 dollars}{1 gram} \frac{2.61*10^{14}g }{1}\)
5. Get the answer:
\(\frac{21.66 dollars}{1 gram} \frac{2.61*10^{14}g }{1} = 5.65 x 10 ^ {15}dollars\)
There ya go!
Name the following alkyne:
Answers
Answer:
There isn't any picture for me to see
have a good day :)
Explanation:
Balance and classify this reaction:
C6H6 +02 →CO2 +H₂O
Answers
2C6H6 + 9O2➡️ 6CO2 + 6H2O
identify the observations that indicate an added solute is insoluble in water.
Answers
Answer:
precipitation occur
Explanation:
the solute do not dissolve in water
The efficiency ratio for a steel specimen immersed in a phosphating tank is the weight of the phosphate coating divided by the metal loss (both in mg/ft 2
). Table gave the accompanying data on tank temperature (x) and efficiency ratio (y). Construct a scatter diagram to represent the relationship between temperature (x) and efficiency ratio (y) on a graph paper. Analyze the relationship between these two parameters by computing the linear regression equation using least square method. Find the correlation coefficient and coefficient of determinations.
Answers
The linear regression equation for the relationship between temperature (x) and efficiency ratio (y) is y = a + bx, where y represents the efficiency ratio and x represents the tank temperature.
In order to analyze the relationship between temperature and efficiency ratio, we can use the method of linear regression. Linear regression helps us determine the equation of a straight line that best fits the given data points. This equation allows us to estimate the efficiency ratio for any given tank temperature.
By using the least squares method, we calculate the values of the regression coefficients a and b. The coefficient a represents the y-intercept of the line, while the coefficient b represents the slope of the line. These coefficients allow us to determine the equation of the line that represents the relationship between temperature and efficiency ratio.
Once we have the regression equation, we can calculate the correlation coefficient and coefficient of determination. The correlation coefficient, denoted by r, measures the strength and direction of the linear relationship between the two variables. It ranges between -1 and 1, where values close to -1 or 1 indicate a strong linear relationship. The coefficient of determination, denoted by \(r^2\), represents the proportion of the total variation in the efficiency ratio that can be explained by the variation in temperature.
By analyzing the scatter diagram, we can visually observe the trend between temperature and efficiency ratio. The linear regression equation and the correlation coefficient provide quantitative measures to further understand and interpret the relationship between these two parameters.
Learn more about Linear regression
brainly.com/question/32505018
#SPJ11
PLEASE HELP!! It’s the last day to get the assignment in!!
What are some signs
scientists look for to
indicate that a chemical
change may have
occurred?
Answers
Answer:
Explanation:
Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change. Or Light is given off, a permanent color change occurs, gas is given off, heat is given off, and a precipitate is formed
many reflux procedures involve a required length of time for the reflux to occur. when should you start timing the reflux for the procedure? select one: when the sample is transferred to the flask when the reflux ring stabilizes in the condenser when you turn on the heat under the flask when the reflux ring passes the top of the condenser
Answers
C. when the reflux ring passes the top of the condenser.
Reflux procedures involve heating a mixture in a flask, with the vapors that are generated condensing in a condenser and returning to the flask. This process is known as reflux and it helps to ensure that the reaction proceeds smoothly and completely.
The reflux ring is a visible indicator of the rate at which the vapor is condensing in the condenser. It is formed at the point where the hot vapor meets the cooler condenser and it moves up and down depending on the amount of vapor being condensed.
Timing the reflux for the procedure is important because it helps to ensure that the reaction proceeds for the required length of time. The reflux period is typically determined by the nature of the reaction and can range from a few minutes to several hours.
Therefore, the correct option is C - when the reflux ring passes the top of the condenser. This ensures that the reflux is occurring at the required rate and the reaction is proceeding as intended.
The Question was Incomplete, Find the full content below :
content loaded
Many reflux procedures involve a required length of time for the reflux to occur.
When should you start timing the reflux for the procedure?
Select one:
a. When you turn on the heat under the flask
b. When the sample is transferred to the flask
c. When the reflux ring passes the top of the condenser
d. When the reflux ring stabilizes in the condenser
Know more about reflux here:
https://brainly.com/question/30290239
#SPJ11
1. Which would dissolve faster?
A. individual salt crystals
B. a big block of salt
2. most cases , when temperature increases , solubility
A. increases
B. decreases
3. As agitation increases , the rate at which a solute will dissolve
A. increases
B. decreases
Answers
1) A. individual salt crystals
2) A. increases
3) A. increases
hope this helps :)
A solution is defined as the homogeneous mixture which contain one or more solutes in a solvent. The factors which affect the solubility are temperature and pressure. Here individual salt crystals dissolve faster.
What is solubility?The maximum amount of solute which can dissolve in a given quantity of the solvent at a certain temperature is defined as the solubility. It is defined as the property exhibited by a material to dissolve in a given solvent.
The powdered salt found to dissolves faster in a solvent than the salt of larger size. The rate of dissolving is affected by the size of the solute. The faster the solute dissolves if its size is smaller. So the individual salt crystals dissolves faster.
In most cases, generally the solubility found to decrease with the increase of temperature. When the temperature increases, the kinetic energy of the molecules increases and thereby decreases the intermolecular force of attraction. The increase in the process of agitation decreases the solubility.
1. The correct option is A
2. The correct option is B
3. The correct option is B
To know more about solubility, visit;
https://brainly.com/question/8591226
#SPJ2
11.19 Let x[n] = 1 + en and y[n] = 1 + 2n be periodic signals of fun- damental period wo = 27/N, find the Fourier series of their product z[n] = x[n]y[n] by (a) calculating the product x[n]y[n] (b) using the periodic convolution of length N = 3 of the Fourier series coefficients of x[n] and y[n]. Is the periodic convolution equal to x[n]y[n] when N = 3? Explain.
Answers
The periodic convolution is equal to x[n]y[n] when N = 3, the answer depends on the specific values of x[n] and y[n].
To find the Fourier series of the product z[n] = x[n]y[n], we can follow these steps:
(a) Calculate the product x[n]y[n]:
z[n] = x[n]y[n] = (1 + en)(1 + 2n)
Expanding the product:
z[n] = 1 + 2n + en + 2en^2
(b) Use the periodic convolution of length N = 3 of the Fourier series coefficients of x[n] and y[n]:
To find the Fourier series coefficients of z[n], we convolve the Fourier series coefficients of x[n] and y[n] over a period of length N = 3. Let's denote the Fourier series coefficients as X[k] and Y[k].
The periodic convolution of length N is defined as:
Z[k] = (1/N) * sum(X[l] * Y[k-l], l=0 to N-1)
For N = 3, we have:
Z[k] = (1/3) * sum(X[l] * Y[k-l], l=0 to 2)
Now we need to calculate the individual Fourier series coefficients of x[n] and y[n] in order to perform the convolution.
Given that the fundamental period wo = 27/N, the fundamental frequency is w0 = 2π/wo = 2πN/27.
For x[n]:
x[n] = 1 + en
The Fourier series coefficients are given by:
X[k] = (1/N) * sum(x[n] * exp(-jkw0n), n=0 to N-1)
Substituting the values:
X[k] = (1/3) * sum((1 + en) * exp(-jkw0n), n=0 to 2)
Similarly, for y[n]:
y[n] = 1 + 2n
The Fourier series coefficients are given by:
Y[k] = (1/N) * sum(y[n] * exp(-jkw0n), n=0 to N-1)
Substituting the values:
Y[k] = (1/3) * sum ((1 + 2n) * exp(-jkw0n), n=0 to 2)
Now we can evaluate the convolution expression to obtain the Fourier series coefficients of z[n].
Regarding whether the periodic convolution is equal to x[n]y[n] when N = 3, the answer depends on the specific values of x[n] and y[n].
The periodic convolution is a mathematical operation that combines the Fourier series coefficients of two signals to obtain the Fourier series coefficients of their product. It may or may not be equal to the product of the original signals, depending on their specific properties and the chosen value of N.
To determine if the periodic convolution is equal to x[n]y[n] when N = 3, we need to perform the calculations and compare the results.
Learn more about periodic convolution from the given link!
https://brainly.in/question/9541
#SPJ11
The density of water is 1g/cm3. What might be the density of an object that floats in water
Answers
Answer:
The mass of water is known to be 1 g/mL or 1 g/cm3. If an object has a density greater than 1 g/cm3, it is denser than water and will sink. If it has a density of less than 1 g/cm3, it will float. For example, a penny is made out of zinc (7.14 g/cm3) and copper (8.96 g/cm3) so it sinks in water.
Explanation:
When is Africa's Serengeti plains herbivores migrate across this area following pls pls help me out
Answers
In a chemistry experiment, 50.00 ml 50.00 ml of 2.0 m 2.0 m h n o 3 hno3 is titrated with 0.50 m 0.50 m n a o h naoh. what volume of n a o h naoh, in ml ml, is required to reach the equivalence point?
Answers
200ml of NaOH is required to reach the equivalence point.
Titration is a standard quantitative chemical analysis laboratory method for determining the concentration of a specified analyte. The titrant or titrator is a reagent that is produced as a standard solution of known concentration and volume. Titration is an essential technique in analytical chemistry, and it is also known as volumetric analysis.
A chemical reaction's equivalence point, also known as the stoichiometric point, is the point at which chemically equivalent quantities of reactants have been combined. The equivalence point for an acid-base reaction is the point at which the moles of acid and base would neutralise each other according to the chemical reaction.
To learn more about equivalence point and titration, here
https://brainly.com/question/14245137
#SPJ4
If a zero order reaction has a rate constant k of 0.0416Mmin and an initial concentration of 2.29 M, what will be its concentration after 20.0 minutes
Answers
Answer:
1.46 M
Explanation:
[A]t=−(0.0416 M/min) x (20.0 min)+2.29 M
[A]t=1.46 M
In a solar cell, semiconductors of the p-type and n-type are placed in contact with each other via a conducting wire. In order to generate an electric current, which of the following must be true? A. Light shining on the system must have enough energy to set electrons in motion from the p-type to the n-type semiconductor. B. An external battery must be attached. C. Light shining on the system must have enough energy to set electrons in motion from the n-type to the p-type semiconductor. D. Light shining on the system will cause oxidation to occur.
Answers
The right response is A. To move electrons from the p-type semiconductor to the n-type semiconductor, light beaming on the system must have sufficient energy.
What is semiconductor?Semiconductors are substances that exhibit conductivity intermediate between that of conductors (often metals) and that of insulators or non-conductors (such as ceramics). Semiconductors can be pure elements like germanium or silicon or compounds like gallium arsenide.
The correct answer is A. Light shining on the system must have enough energy to set electrons in motion from the p-type to the n-type semiconductor.
When light shines on the solar cell, it excites electrons in the p-type semiconductor, allowing them to move across the interface to the n-type semiconductor. This creates a flow of electrons, which can be harnessed to generate an electric current. This process is known as the photovoltaic effect.
Option B is incorrect because an external battery is not required to generate an electric current in a solar cell. Option C is also incorrect because the electrons move from the p-type to the n-type semiconductor, not the other way around. Option D is also incorrect because oxidation does not play a role in the functioning of a solar cell.
Learn more about semiconductors on:
https://brainly.com/question/18132856
#SPJ11
State the worded equation for the reaction that occurred in a beaker when copper is placed in a beaker of silver nitrate.
Answers
The reaction of silver nitrate with copper is a substitution reaction. We have copper in its free state, Cu, and we have silver nitrate which has the formula AgNO3. The copper replaces the silver obtaining the following reaction:
\(2AgNO_{3(aq)}+Cu_{(s)}\rightarrow Cu(NO_3)_{2(aq)}+2Ag_{(s)}\)The products obtained are copper nitrate and silver.
The word equation will be:
\(SilverNitrate+Copper\rightarrow Copper(II)Nitrate+Silver\)Who is the kingdom of plants?
Answers
Answer:
i think you mean what is the kingdom of plants, but its "Kingdom Plantae".
Kingdom Plantae traits: eukaryotic/have nucleus, multicellular and autotrophic. (they photosynthesis)
2nd largest kingdom
Answer:
Introduction: All the plants are placed in the Kingdom- Plantae, according to the five-kingdom classification by R.H. Whittaker. The Kingdom- Plantae consists of multicellular plants with eukaryotic organization and chlorophyllous cells.
Explanation:
What is the kingdom for plants called?
What are the 3 plant kingdoms?
Kingdom Plantae Organisms
Ferns: They fall under the division Pteridophyta and are known to have vascular tissue. ...
Mosses: They fall under the division Bryophyta and have no vascular system. ...
Cone-bearing plants: They fall under the division Spermatophyta, sub-division gymnosperms
How many hydrogen atoms are in 5.50 mol of ammonium sulfide?
Answers
There are 6.62 x 10²⁴ hydrogen atoms present in 5.50 mol of ammonium sulfide.
Ammonium sulfide is a chemical compound whose chemical formula is (NH4)2S. It is used as a reagent in organic and inorganic synthesis, as well as a photographic developer, dyeing auxiliary, and sulfiding agent. Each ammonium sulfide molecule contains two nitrogen atoms, eight hydrogen atoms, and one sulfur atom.
Hence, the total number of hydrogen atoms present in 5.50 mol of ammonium sulfide is obtained by multiplying Avogadro's number by the number of moles of ammonium sulfide, and then by the number of hydrogen atoms per molecule of ammonium sulfide.
Number of hydrogen atoms in 5.50 mol of ammonium sulfide
Number of moles of ammonium sulfide = 5.50 mol
Number of hydrogen atoms per molecule of ammonium sulfide = 8
Total number of hydrogen atoms in 5.50 mol of ammonium sulfide = (Number of moles of ammonium sulfide) × (Avogadro's number) × (Number of hydrogen atoms per molecule of ammonium sulfide) = (5.50 mol) × (6.02 × 10²³) × (8) = 2.63 × 10²⁵ hydrogen atoms.
Learn more about hydrogen atoms at brainly.com/question/12370246?
#SPJ11
How many atoms are in 6.3 moles of lead
Answers
Answer:
3.79 x 10²⁴atoms
Explanation:
Given parameters:
Number moles of lead = 6.3moles
Unknown:
Number of atoms = ?
Solution:
To solve this problem,
1 mole of a substance contains 6.02 x 10²³ atoms
6.3 mole of Pb will contain 6.3 x 6.02 x 10²³ = 3.79 x 10²⁴atoms
Which of the following statements about atoms is FALSE?
A) Atoms compose all matter.
B) Atoms are responsible for the sensation of smell.
C) Atoms are the basic building block of nature.
D) An atom is the smallest identifiable unit of an element.
E) All of the above statements are true.
Answers
The statement about atoms that is FALSE from the following options is: B) Atoms are responsible for the sensation of smell.
What is an atom?
An atom is the smallest possible unit of matter that retains the chemical and physical characteristics of a component. Each element is made up of a unique kind of atom that has the same number of protons in its nucleus. In the periodic table, elements are arranged by atomic number.The following are the given options:A) Atoms compose all matter.B) Atoms are responsible for the sensation of smell.C) Atoms are the basic building block of nature.D) An atom is the smallest identifiable unit of an element.E) All of the above statements are true.Out of these given options, B) Atoms are responsible for the sensation of smell is the FALSE statement. The sensation of smell is produced by olfactory receptors in the nasal cavity, which are stimulated by molecules of various shapes and sizes.
know more about atom.
https://brainly.com/question/33439820
#SPJ11
How many atoms of K are present in 195.49 grams of K?
Answers
Answer:
A- 3.0110 X 10^24
Explanation:
I took the quiz
The term mole concept is used here to determine the number of atoms of potassium. The number of atoms of potassium present in 195.49 grams is 3.011 × 10²⁴.
What is a mole?One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is given as:
Number of moles of atoms (n) = Given mass / Gram atomic mass
The given mass of potassium = 195.49 g
The atomic mass of 'K' = 39.098 g
n = 195.49 / 39.098 = 5 mol
Number of atoms = Number of moles of atoms × 6.022 × 10²³
5 mol × 6.022 × 10²³ = 3.011 × 10²⁴
Thus the number of atoms is 3.011 × 10²⁴ .
To know more about mole concept, visit;
https://brainly.com/question/19730733
#SPJ2
examine the following order of elution of compounds containing certain functional groups from fastest to slowest, and indicate which mistake has been made.hydrocarbons, olefins, ethers, amines, ketones, aldehydes, esters, alcohols, aromatics, and carboxylic acidsamines and aromatics are switched.ethers and esters are switched.alcohols and aromatics are switched.aromatics and esters are switched.aldehydes and esters are switched.
Answers
The Elution sequence of compounds containing certain functional groups from the fastest to the slowest is hydrocarbons, olefins, ethers, halo carbons, aromatics, ketones, aldehydes, esters, alcohols, amines and acids.
Elution:
Elution in organic and analytic chemistry refers to the process in which one material is extracted from another material by washing it with the help of a solvent.
In an elution sequence, regardless of the polarity of the compounds, the solvent which is more polar, its chemicals elutes faster. Therefore, amending the polarity of the solvent will not change the order of elution of compounds. It might seem contradictory as a polar solvent seems to convey polar compounds beyond the non-polar compounds.
Contemplating the solvents and the chemicals will fight for the stationary phase locations conductive to help us visualize the intention. Slow elution would be created by the molecules which were remained to attach to the stationary phase due to poor ability of a less polar solvent to compete. Molecules and a polar solvent successfully asserted for the stationary phase locations.
To learn more about the elution and functional group
brainly.com/question/8728246
#SPJ4
Oxygen gas is prepared in the laboratory through the catalytic decomposition of hydrogen peroxide. Define a catalyst
Answers
Answer:
Catalyst:
Explanation:
A catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
select the generic nonpolar amino acid that is in the correct form at ph=7.0 , or at physiological conditions. pay close attention to the charges on the amino group and the carboxylic acid group and the carboxylic acid group. C View Available Hint(s) Н.N—ҪH—С-о- R + Н; N—CH—С-ОН R Н.N—CH—С-ОН. H;N— CH—С—О- R
Answers
The nonpolar amino acid that is in the correct form at pH 7.0 is N-CH3-COOH or alanine, as it has a neutral charge at this pH.
The nonpolar amino corrosive that is in the right structure at physiological circumstances (pH=7.0) is choice C: NH2-CH(R)- COOH. At physiological pH, the amino gathering (- NH2) goes about as a powerless base and gets a proton (H+) to shape - NH3+. Essentially, the carboxylic corrosive gathering (- COOH) goes about as a powerless corrosive and gives a proton (H+) to shape - COO-. At pH 7.0, the net charge on the amino corrosive particle is zero in light of the fact that the - NH3+ bunch and - COO-bunch counteract one another. The R gathering can be any nonpolar side chain, like methyl (- CH3) or phenyl (- C6H5), since it doesn't influence the ionization condition of the amino and carboxylic corrosive gatherings. In this way, choice C is the right nonpolar amino corrosive that is in the right structure at physiological circumstances.
To learn more about nonpolar, refer:
https://brainly.com/question/29127853
#SPJ4
What conditions are required for iron to rust?
Answers
The availablity of oxygen and moisture or water.
Perform the following
mathematical operation, and
report the answer to the
correct number of significant
figures.
16.25 +1.35 = [ ?]
=
Answers
Answer:
12.037037
Explanation:
16.25/1.35 = 12.037037
The following mathematical operation has answer as 12.037037 and significant figures are 8.
What are significant figures?Significant figures are the number of digits in a value, or a measurement, that can be calculated to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit.
5 rules of writing Significant Figures are-
1. All non-zero numbers ARE significant.
2. Zeros between two non-zero digits ARE significant.
3. Leading zeros are NOT significant.
4. Zeros to the right of the decimal ARE significant.
5. Zeros in a whole number with the decimal shown ARE significant.
Given,
16.25 ÷ 1.35
= 12.037037
Significant figures = 8
Therefore, The following mathematical operation has answer as 12.037037 and significant figures are 8.
Learn more about significant figures, here:
https://brainly.com/question/29153641
#SPJ7
Perform the following operation
and express the answer in
scientific notation.
3.2×104 x 3.0×107
[? ]×10¹²]
Enter the coefficient for the green box and the
exponent only for the yellow box.
CC
![Perform the following operationand express the answer inscientific notation.3.2104 x 3.0107[? ]10]Enter](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/iRsoAqraEXG4rfsPu3zxXVIqhodcZdkq.png)
Answers
answer :
9.6x10¹¹
steps:
(3.2×10⁴)*(3.0×10⁷)=
multiply 3.2 with 3.0
3.2 x 3.0 = 9.6
add the exponents
7 + 4 = 11 so its
9.6x10¹¹
wlfrmalpha
How many moles are in 1.204 x 10^24 atoms of iron (Fe)?
Answers
What is the pH of a solution of 0. 25M K3PO4, potassium phosphate? Given
Ka1 = 7. 5*10^-3
Ka2 = 6. 2*10^-8
Ka3 = 4. 2*10^-13
I know there is another post here with the same question but nobody explained anything. Where does the K3 go? Why does everyone I see solve this just ignore it and go to H3PO4?
Answers
The pH of a 0.25 M K3PO4 solution, taking into account the dissociation steps and the acid dissociation constants, is approximately 12.17.
The K3 in K3PO4 represents the potassium ions in the compound, which are spectator ions and do not contribute to the pH of the solution. When determining the pH of a solution of K3PO4, we focus on the phosphate ion (PO4^3-) and its acid-base properties.
The phosphate ion, PO4^3-, can undergo multiple acid-base reactions due to the presence of three dissociable protons (H+ ions). Each proton has its own acid dissociation constant (Ka) associated with it. In this case, we have three Ka values: Ka1, Ka2, and Ka3.
To determine the pH of the solution, we need to consider the dissociation of H+ ions from each step of the acid dissociation. The pH can be calculated based on the equilibrium concentrations of H+ and the acid dissociation constants.
The dissociation reactions for the three steps are as follows:
Step 1: H3PO4 ⇌ H+ + H2PO4-
Step 2: H2PO4- ⇌ H+ + HPO4^2-
Step 3: HPO4^2- ⇌ H+ + PO4^3-
The concentration of H+ ions from each step will depend on the initial concentration of K3PO4 and the relative magnitudes of the Ka values.
To calculate the pH of the solution, we need to consider all three steps and their equilibrium concentrations of H+ ions. It is a complex calculation that involves solving a system of equations. Here, I will provide you with the final result:
The pH of a 0.25 M K3PO4 solution, taking into account the dissociation steps and the acid dissociation constants, is approximately 12.17.
Learn more about dissociation constants here
https://brainly.com/question/28197409
#SPJ11
Please help :(
I just need the bottom true or false part
Answers
Answer:
if you mean question 21
true
Explanation:
sorry if wrong