what is the ph of a buffer solution containing equal volumes of 0.11 m nach3coo
Answers
The pH of the buffer solution containing equal volumes of 0.11 M NaCH3COO is approximately 4.76.
The pH of a buffer solution can be determined by considering the dissociation of the acid and its conjugate base. In this case, we have a buffer solution containing equal volumes of 0.11 M NaCH3COO, which consists of the salt of the weak acid CH3COOH (acetic acid) and its conjugate base CH3COO- (acetate ion).
The dissociation of acetic acid can be represented as follows:
CH3COOH ⇌ CH3COO- + H+
Since the solution contains equal volumes of the acid and its conjugate base, their concentrations will be the same. Therefore, the concentration of CH3COO- in the buffer solution is 0.11 M.
To determine the pH, we need to calculate the pKa of acetic acid. The pKa value represents the acidity of the acid and is equal to the negative logarithm of its acid dissociation constant (Ka). For acetic acid, the pKa is approximately 4.76.
Using the Henderson-Hasselbalch equation, which relates the pH of a buffer solution to the pKa and the ratio of the concentrations of the conjugate base to the acid, we can calculate the pH:
pH = pKa + log([CH3COO-]/[CH3COOH])
Substituting the values, we get:
pH = 4.76 + log(0.11/0.11)
pH = 4.76 + log(1)
pH = 4.76 + 0
pH = 4.76
Therefore, the pH of the buffer solution containing equal volumes of 0.11 M NaCH3COO is approximately 4.76.
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Related Questions
this diagram shows rock formations forming. which statement describes one or both formations
Answers
Answer:
c
Explanation:
formation is an igneous rock
Which choice is not an example of a molecule?
Answers
22. Which of these amino acids are both ketogenic and glucogenic?
1. Isoleucine
2. Valine
3. Histidine
4. Arginine
5. Tyrosine
A) 1 and 5
B) 1, 3, and 5
C) 2 and 4
D) 2, 3, and 4
E) 2, 4, and 5
Answers
The amino acids that are both ketogenic and glucogenic are isoleucine and tyrosine. Therefore, option A is the correct answer.
Ketogenic amino acids can be converted to ketone bodies, such as acetyl-CoA, which can be used for energy production.
Glucogenic amino acids can be converted to glucose, which can be used for energy production or stored as glycogen in the liver or muscles.
Isoleucine is a branched-chain amino acid that can be converted to acetyl-CoA and acetoacetate, making it ketogenic.
It can also be converted to succinyl-CoA, which is an intermediate in the TCA cycle and can be used for glucose production, making it glucogenic.
Tyrosine is an aromatic amino acid that can be converted to fumarate, which is an intermediate in the TCA cycle and can be used for glucose production, making it glucogenic.
It can also be converted to acetoacetate, making it ketogenic.
Histidine and arginine are only glucogenic amino acids. Histidine can be converted to fumarate, which is an intermediate in the TCA cycle and can be used for glucose production.
Arginine can be converted to fumarate, succinyl-CoA, and pyruvate, which are all intermediates in the TCA cycle and can be used for glucose production.
Valine is only ketogenic and cannot be used for glucose production. It is converted to acetyl-CoA and can be used for energy production.
In conclusion, isoleucine and tyrosine are the two amino acids that are both ketogenic and glucogenic.
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What would be the molarity of a solution if 500.0mL of a 3.0 M KCl solution is diluted to 3.0L?
Answers
Answer
0.50 M
Explanation
Given:
Initial volume (V1) = 500.0 mL = 0.5 L
Initial molarity (C1) = 3.0 M
Final volume (V2) = 3.0 L
Required: The final molarity (C2)
Solution
C1V1 = C2V2
C2 = C1V1/V2
C2 = (3.0 M x 0.5 L)/3.0 L
C2 = 0.50 M
Calculate the volume (in mL) of 0. 100 M CaCl2 needed to produce 1. 00 g of CaCO3 (s). There is an excess of Na2CO3. Volume of calcium chloride in mL
Answers
99.92 mL of 0.100 M CaCl2 solution is calculated to be needed, in order to produce 1.00 g of CaCO3.
The balanced chemical equation for the reaction between CaCl2 and Na2CO3 is:
CaCl2 + Na2CO3 → CaCO3 + 2NaCl
From the equation, we can see that 1 mole of CaCl2 produces 1 mole of CaCO3. The molar mass of CaCO3 is:
molar mass of CaCO3 = 40.08 g/mol + 12.01 g/mol + 3(16.00 g/mol) = 100.09 g/mol
The number of moles of CaCO3 produced from 1.00 g of CaCO3 is:
moles of CaCO3 = mass of CaCO3 / molar mass of CaCO3
moles of CaCO3 = 1.00 g / 100.09 g/mol
moles of CaCO3 = 0.009992 mol
Since 1 mole of CaCl2 produces 1 mole of CaCO3, we need 0.009992 moles of CaCl2 to produce 1.00 g of CaCO3.
The volume of 0.100 M CaCl2 solution required to provide 0.009992 moles of CaCl2 is:
moles of CaCl2 = concentration of CaCl2 × volume of CaCl2
volume of CaCl2 = moles of CaCl2 / concentration of CaCl2
volume of CaCl2 = 0.009992 mol / 0.100 mol/L
volume of CaCl2 = 0.09992 L or 99.92 mL
Therefore, 99.92 mL of 0.100 M CaCl2 solution is required to produce 1.00 g of CaCO3.
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draw one possible dipeptide that is formed between alanine and leucine, as the zwitterion.
Answers
To form a dipeptide between Alanine and Leucine, we have to join the carboxyl group (COOH) of Alanine with the amino group (NH₂) of Leucine via a peptide bond. The resulting molecule will have a zwitterionic form. The zwitterionic form of the dipeptide will have both a positive and a negative charge.
A dipeptide is a molecule made up of two amino acid residues joined together via a peptide bond. A peptide bond is a bond between the amino group (NH₂) of one amino acid and the carboxyl group (COOH) of another amino acid. Amino acids are the building blocks of proteins. Alanine and Leucine are two of the twenty common amino acids found in nature.
A zwitterion is a molecule that has a positive charge on one part of the molecule and a negative charge on another part of the molecule. Zwitterions are electrically neutral overall. They are formed when a molecule that has both acidic and basic functional groups is dissolved in a solvent. The acidic and basic groups react with each other to form a neutral molecule that has both positive and negative charges. The zwitterionic form of an amino acid is the form that is found in proteins.
The chemical formula for Alanine is C₃H₇NO₂, and the chemical formula for Leucine is C₆H₁₃NO₂. To form a dipeptide between Alanine and Leucine, we have to join the carboxyl group (COOH) of Alanine with the amino group (NH₂) of Leucine via a peptide bond. The resulting molecule will have a zwitterionic form. The zwitterionic form of the dipeptide will have both a positive and a negative charge.
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A substance with a specific heat of 5 J/g°C absorbs 25 Joules of energy and increases from 75°C to
125°C. What is the mass of this substance?
1.0 gram
O 0.01 gram
0.1 gram
O 10 grams
Answers
Explanation:
0 10 grams that that should be the answer
Which of these is a chemical property of aluminium
Answers
Answer:
Option 1
Explanation:
Density of 2.70 g/cm^-3
Answer:
Explanation:
For it’s actually ( Aluminium is highly reactive )
Which of these is the dominant mechanism for the removal of carbon dioxide from the atmosphere?A) subductionB) photosynthesis in plantsC) dissolving carbon dioxide in seawaterD) formation of carbonate-rich rocks at the seafloor
Answers
The dominant mechanism for the removal of carbon dioxide from the atmosphere is the process of photosynthesis in plants. During this process, carbon dioxide is absorbed by plants and converted into organic matter, which is then used for plant growth and development. This mechanism is important because it not only removes carbon dioxide from the atmosphere but also produces oxygen, which is essential for the survival of many living organisms.
Although photosynthesis is the primary mechanism for the removal of carbon dioxide from the atmosphere, other processes also play a role. One such process is the dissolution of carbon dioxide in seawater, which can result in the formation of carbonate ions. These carbonate ions can then react with calcium ions in seawater to form calcium carbonate, which can eventually settle on the seafloor and form carbonate-rich rocks.
Subduction, on the other hand, is a process by which one tectonic plate is forced beneath another. This process does not directly remove carbon dioxide from the atmosphere, but it can contribute to the removal of carbon dioxide over long periods of time. When tectonic plates are forced beneath one another, they can carry carbon-rich sediments with them, which can then be subjected to high temperatures and pressures, causing them to release carbon dioxide into the atmosphere.
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is the yellowing of the pages of an old book a physical or chemical change? please explain
Answers
Answer: a chemical change. A physical change would be like crushing up a piece of paper, you could fold it back out until its flat. A chemical change would be something unreversable, i.e. going from all the different ingredients to a fully b asked cookie. The yellowing of pages is due to oxidization.
Explanation:
The yellowing of the pages of an old book is a chemical change that happens due to the reaction of paper with the air and fungus present in the air.
What are chemical changes?Chemical changes are those changes that occur due to the reaction of two or more substances between them. These changes are irreversible. These changes change the physical and chemical condition of the substance.
A perceptible change would be comparable to crumpling up a sheet of paper and then folding it out again till it is flat.
An irreversible chemical shift would be going from all the various ingredients to a completely baked cookie. Oxidation is what causes the pages to turn yellow.
Thus, an old book's pages will eventually turn yellow due to a chemical interaction between the paper and the air and any fungi in the air.
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a representation of one unit of c6h12o6c6h12o6 in water is shown below. (the water molecules are intentionally not shown.)
Answers
The given representation of one unit of C₆H₁₂O₆ in water is incomplete as it does not include the water molecules that are essential for the dissolution process.
In the given representation, only the C₆H₁₂O₆ molecules are shown, while the water molecules are intentionally not depicted. However, when C₆H₁₂O₆ dissolves in water, it forms a solution where C₆H₁₂O₆ molecules are surrounded by water molecules, resulting in a hydrated state.
Therefore, the representation is incomplete and inaccurate since it neglects the presence of water molecules, which play a crucial role in the dissolution and formation of a hydrated C₆H₁₂O₆ complex in water.
The question should be:
A representation of one unit of C₆H₁₂O₆ in water is shown below. (The water 12 molecules are intentionally not shown.)
(a) What is wrong with this representation?
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which combinations of solutions will produce one or more precipitates? select all that apply
-CaBr2 + K3PO4
-MgCl2 + NaSO4
-AgNO3 + NH4Br
-Ba(NO3)2 + KI
Answers
The combinations of the solutions will produce one or more precipitates the correct options are :
CaBr₂ + K₃PO₄
AgNO₃ + NH₄Br
The combinations of the solutions that will produce one or the more precipitates are as follows :
CaBr₂ + K₃PO₄AgNO₃ + NH₄BrThe chemical equation are as follows :
3CaBr₂(aq) + 2K₃PO₄(aq) ----> Ca₃(PO₄)₂(s) + 6KBr(aq)
In this reaction the precipitate is Ca₃(PO₄)₂.
AgNO₃(aq) + NH₄Br(aq) ---> AgBr(s) + NH₄NO₃(aq)
In this reaction the precipitate is AgBr.
The precipitate in the process of the conversion of dissolved substances in to the insoluble solid from the super saturated solution. The solid which is formed in the reactionis called as the precipitate.
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Which of the following conditions on Mars would be the first to kill a human who is unprotected and unassisted by life support?
A
Colder than Antarctic temperatures.
B
Low air pressure.
C
High CO2 atmosphere.
D
Excess solar radiation due to a missing magnetic field.
Answers
Answer:
D
Excess solar radiation due to a missing magnetic field.
Explanation: Solar proton events (SPEs) are bursts of energetic protons accelerated by the Sun. They occur relatively rarely and can produce extremely high radiation levels. Without thick shielding, SPEs are sufficiently strong to cause acute radiation poisoning and death.
Hope this hels
plz mark brainliest
Of which substance would an adult be able to consume the largest quantity before experiencing life-threatening effects?
Your answer:
botulinum
acetaminophen
sugar
water
salt
Answers
Answer:
Water
Explanation:
hope that helps:)
Two objects are filled with air, and have the exact same mass. There air in the first object is heated and it now has a higher temperature than the second object. The air in which object has more thermal energy?
Answers
How many grams of H,O are needed to produce 13 g of NaOH? 2 Na,O2 + 2 H20-4 NaOH + O2
Answers
Answer:
This is a typical stoichiometry question.To answer this question you want to get a relationship between
N
a
2
O and NaOH.
So you can get a relationship between the moles of
N
a
2
O
and moles of NaOH by the concept of stoichiometry.
N
a
2
O +
H
2
O ----------------> 2 NaOH.
According to above balanced equation we can have the stoichiometry relationship between
N
a
2
O and NaOH. as 1:2
It means 1 moles of
N
a
2
O is required to react with one mol of
H
2
O to produce 2 moles of NaOH.
in terms of mass 1 mole of
N
a
2
O has mass 62 g on reaction with water produces 2 moles of NaOH or 80 g of NaOH.
62 g of
N
a
2
O produces 80 g of NaOH.
1g of NaOH is produced from 62/80 g of
N
a
2
O
1.6 x
10
2
g of NaOH will require 62 x 1.6 x
10
2
g / 80 of
N
a
2
O
124g of
N
a
2
O.
Explanation:
PLEASE HELP!! I GIVE BRAINLIEST
1)Which process represents chemical change?
A. A lake freezes over into ice.
B. A metal bar is rolled into a flat sheet.
C. Vinegar bubbles when baking soda is added. D. Sand, water, and salt combine to form a mixture.
2)Which process is an example of a physical change?
A. Carrots are cut into small pieces and mixed into a salad.
B. A peanut butter sandwich is eaten and broken down by enzymes in the stomach.
C Sodium metal and chlorine gas are combined to form sodium chloride, or table salt.
D. Sodium metal and water are combined to form a basic compound and a flammable gas.
3) Which of the following is a chemical change?
A. Water boiling
B. Paper being cut
C. Ice melting
D. rusting
4) Which of these is a clue that a chemical change has occurred?
A. A beaker suddenly becomes very warm when you mix two room-temperature it.
B. A liquid forms bubbles when it reaches a high temperature.
C. Water changes color when you add food coloring to it.
D. Sugar crystals disappear when dissolved in water.
5) To cause a chemical change in wood, you can ...
A. Break it.
B. Burn it.
C. Cut it.
D. Saw it.
6) Which of the following is not a good indication that a chemical change has occurred?
A. The formation of gases
B. A change in color
C. A scratched surface
D. The release heat or light
Answers
Answer:
1)C 2)B 3)D
Explanation:
1. The process represents chemical change is vinegar bubbles when baking soda is added.
2. The process is an example of a physical change is carrots are cut into small pieces and mixed into a salad.
What is physical and chemical change ?The appearance or form of matter changes during a physical change, but the type of matter in the substance does not.
A chemical change, on the other hand, changes the type of matter and creates at least one new substance with new properties.
3. Rusting is a chemical change.
4. A beaker suddenly becomes very warm when you mix two room-temperature it is a clue that a chemical change has occurred.
5. To cause a chemical change in wood, you can burn it.
6. A scratched surface is not a good indication that a chemical change has occurred.
Thus, The process represents chemical change is vinegar bubbles when baking soda is added.
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yo uh help, thanks sm <3
Answers
1. The mass of KClO₃ that decomposed to produce 17.4 g of O₂ is 44.4 g
2. The mass of KClO₃ that formed 23.7 g of KCl is 39.0 g
3. The mole of O₂ that is formed from 1.45 moles of KClO₃ is 2.18 moles
4. The mole of KClO₃ that decomposed to produced 167.7 g of KCl is 0.22 mole
1. How do i determine the mass of KClO₃ that decomposed?The mass of KClO₃ that decomposed to produce 17.4 g of O₂ can be obtain as follow:
2KClO₃ -> 2KCl + 3O₂
Molar mass of O₂ = 32 g/molMass of O₂ from the balanced equation = 3 × 32 = 96 g Molar mass of KClO₃ = 122.5 g/molMass of KClO₃ from the balanced equation = 2 × 122.5 = 245 gFrom the balanced equation above,
96 g of O₂ were obtained from 245 g of KClO₃
Therefore,
17.4 g of O₂ will be obtain from = (17.4 × 245) / 96 = 44.4 g of KClO₃
Thus, the mass of KClO₃ that decomposed is 44.4 g
2. How do i determine the mass of KClO₃?The mass of KClO₃ that formed 23.7 g of KCl can be obtain as follow:
2KClO₃ -> 2KCl + 3O₂
Molar mass of KCl = 74.5 g/molMass of O₂ from the balanced equation = 2 × 74.5 = 149 g Molar mass of KClO₃ = 122.5 g/molMass of KClO₃ from the balanced equation = 2 × 122.5 = 245 gFrom the balanced equation above,
149 g of KCl were obtained from 245 g of KClO₃
Therefore,
23.7 g of KCl will be obtain from = (23.7 × 245) / 149 = 39.0 g of KClO₃
Thus, the mass of KClO₃ is 39.0 g
3. How do i determine the mole of O₂ formed?The mole of O₂ that is formed from 1.45 moles of KClO₃ can be obtained as follow:
2KClO₃ -> 2KCl + 3O₂
From the balanced equation above,
2 mole of KClO₃ reacted to produce 3 moles of O₂
Therefore,
1.45 moles of KClO₃ will react to produce = (1.45 × 3) / 2 = 2.18 moles of O₂
Thus, the mole of O₂ formed is 2.18 moles
4. How do i determine the mole of KClO₃ that decomposed?First, we shall obtain the mole of 16.7 g of KCl. Details below:
Mass of KCl = 16.7 grams Molar mass of KCl = 74.5 g/mol Mole of KCl =?Mole = mass / molar mass
Mole of KCl = 16.7 / 74.5
Mole of KCl = 0.22 mole
Finally, we shall determine the mole of KClO₃ that decomposed. Details below:
2KClO₃ -> 2KCl + 3O₂
From the balanced equation above,
2 moles of KCl were obtained from 2 moles of KClO₃
Therefore,
0.22 mole of KCl will also be obtain from 0.22 mole of KClO₃
Thus, the mole of KClO₃ that decomposed is 0.22 mole
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Which atom (magnesium or chlorine) is larger? _______________________(you should also be prepared to answer the question if asked for the smaller atom)3a. Explain why the atom is larger. Include the following terms in your answer: protons, electrons, shells or layers, columbic attractions
Answers
Answer:
The magnesium atom is larger.
Explanation:
The magnesium atom is larger because it is on the left side of the Periodic Table (period 3 and group 2) where the atomic radius is larger.
Atomic radius is the distance from the center of the nucleus of an atom to the most external electron shell.
The greater the columbic attractions, the closer the protons in the nucleus are to the electrons in the outer layers, making the size of the atom smaller.
Can compounds be broken down into the elements they are made of?
Answers
Answer:
yes, some can
Explanation:
because like salt an other compounds by being decomposed
WHATS THE DIFFERENCE BETWEEN MASS AND WEIGHT WELPPPPP
Answers
Answer:
Mass is amount of matter. Weight is how that matter is affected by gravity.
Explanation:
When using a calorimeter, the initial temperature of a metal is 70.4C. The initial temperature of the water is 23.6C. At the end of the experiment, the final equilibrium temperature of the water is 29.8C.
Answers
Answer:
temperature of a metal is29.8
temp. of water is 6.2
temp. change of metal -40.6
Explanation:
Write an equation that shows the formation of a strontium ion from a neutral strontium atom
Answers
Answer:
See explanation
Explanation:
Sr(s) + 2HCl(aq) -----> SrCl2(aq) + H2(g)
Ionically;
Sr(s) + 2Cl^-(aq) ----> SrCl2(aq)
If we look at the reaction above, strontium atom was dissolved in hydrochloric acid. The strontium atom is now oxidized by the acid to give Sr^2+ ion according to the equation shown above.
Which sentence describes a spontaneous redox reaction between two
elements?
A. The element with the greater reduction potential is oxidized.
B. The element with the greater reduction potential is reduced.
C. The reduced element has a smaller reduction potential than the
oxidized element
D. The sum of the reduction potential and oxidation potential is
negative
Answers
Answer:
B. The element with the greater reduction potential is reduced.
Explanation:
I took the test
The element Chromium has 4 naturally occurring isotopes. Use the relative abundance of each to calculate the average atomic mass of chromium. (Must show work!)
Cr-50 = 4.34%, Cr-52 = 83.79%, Cr-53 = 9.50%, Cr-54 = 2.37%
Answers
According to the given statement The average Cr atomic mass unit is 51.9963 amu.
What defines the atomic mass?A single atom's atomic mass is only its total mass, and it is usually given in atomic mass units, or amu. A carbon atom with six neutrons, or helping students learn, has an atomic mass of Twelve amu by definition.
Do elements have atomic mass?The entire weight of one atom in an element is referred to as its atomic mass. The atomic mass is its average atomic mass given in atomic mass units (amu, also known as daltons, D). Atomic weight is another name for the atomic number.
Briefing:Chromium exists in four isotopes that are naturally occurring: 50Cr (atomic mass: 49.9460 amu), 52Cr (atomic mass: 51.9405 amu), 53Cr (atomic mass: 52.9407 amu), and 54Cr (atomic mass: 2.37% amu).
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during metamorphism, what is the major effect of chemically active fluids? group of answer choices they prevent partial melting so solid rocks can undergo very high temperature regional metamorphism. they facilitate the formation of schistosity and gneissic banding in hornfels and slates. they increase the pressures in deeply buried, regional-metamorphic zones. they aid in the movement of dissolved silicate constituents and facilitate growth of the mineral grains.
Answers
Chemically active fluids primarily aid in the mobility of dissolved silicate components and facilitate the development of the mineral grains during metamorphism.
What are chemically active fluids' principal effects during metamorphism?During metamorphism, chemically active fluids that are present between the mineral grains help to promote ion movement and the re-crystallization of both old and new minerals.
What is the primary outcome of metamorphosis?Rocks that have undergone metamorphism include igneous, sedimentary, and other types of metamorphic rocks. The variations include the creation of new minerals, an increase in grain size, and adjustments to the structure or texture of the rock, depending on the chemical composition of the original rock and the degree of metamorphism.
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NEED THIS ASAP PLEASE HELP!! WILL GIVE 10 PTS!! WILL MARK BRAINLIST!!
The base Ba(OH)2 neutralizes the acid H2SO4 according to the equation below. What salt is produced?
H2SO4 + Ba(OH)2 -->
A. BaSO4
B. BaH2
C. BaH2S
D. BaO4
Answers
Answer:
According to the equation below salt is produced by BaH2s
Answer:
I think b is the correct answer
1) Which of the following is true about Earth’s plates?
a. Earth’s plates are separated by oceans.
b. Earth’s plates are piled on top of one another within the Earth.
c. Earth’s plates fit closely together with the edges of the plates touching each other.
d. Earth’s plates are surrounded by melted rock and do not touch each other.
Answers
Answer:
a because the others whould cause earthquakes
Explanation:
Answer:
A
Explanation:
because i think is A (if is not im sorry )
What is true of a saturated solution?
Answers
Answer:
A saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved. At 20°C, the maximum amount of NaCl that will dissolve in 100. g of water is 36.0 g. If any more NaCl is added past that point, it will not dissolve because the solution is saturated.
How would you prepare a 1 L solution of 3 M MgO?
Answers
Answer: 175.35g
Explanation: A 3 M solution has 3 moles of solute per litre.
The mass of one mole of NaCl equals the MW of NaCl MW = 35.45 + 23 =58.45 g/mol
The mass of 3 moles is 58.45 g/mol ×3 mol=175.35 g NaCl or 200 g rounded to one sigfig.