Sign up for free to keep watching this solution

Solution: You are asked to go into the lab and prepare a buffer soluti...

Question

You are asked to go into the lab and prepare a buffer solution with a pH of 6.40 ± 0.2.  Which weak acid would be the best choice?

            A)  carbonic acid                                Ka = 4.2 x 10-7   

            B)  phenol                                           Ka = 1.3 x 10-10   

            C)  ascorbic acid                                 Ka = 8.0 x 10-5   

            D)  hydrosulfuric acid                          Ka = 9.5 x 10-8   

            E)  potassium hydrogen phthalate      Ka = 3.1 x 10-6    

Related Solutions

The addition of hydrochloric acid and __________ to water produces a buffer so...

The addition of hydrochloric acid and __________ to water produces a buffer so...

Which of the following solutions is a good buffer system?

A) A solution that ...

Which of the following solutions is a good buffer system? A) A solution that ...

Calculate the pH of a solution made by mixing 8.627 g of sodium butanoate in e...

Calculate the pH of a solution made by mixing 8.627 g of sodium butanoate in e...

Which pair of substance can be dissolved together (in the right ratio) to prep...

Which pair of substance can be dissolved together (in the right ratio) to prep...

What is the pH of a buffer solution that contains 0.55 M methylamine, CH 3NH2,...

What is the pH of a buffer solution that contains 0.55 M methylamine, CH 3NH2,...

To create a buffer that maintains a pH around 7.54, which solution would you c...

To create a buffer that maintains a pH around 7.54, which solution would you c...

Blood contains a buffer of carbonic acid (H2CO3) and hydrogen carbonate ion (H...

Blood contains a buffer of carbonic acid (H2CO3) and hydrogen carbonate ion (H...

Which of the following pairs of solution does not produce a buffer?

A. 0.3 M ...

Which of the following pairs of solution does not produce a buffer? A. 0.3 M ...

Which of the following procedures will result in the largest change in pH?

Ad...

Which of the following procedures will result in the largest change in pH? Ad...

One liter of a buffer from the blood is found to have 0.4 moles of acid (pK a ...

One liter of a buffer from the blood is found to have 0.4 moles of acid (pK a ...

You are asked to go into the lab and prepare a buffer solution with a pH of 6....

You are asked to go into the lab and prepare a buffer solution with a pH of 6....

Calculate the pH of a buffer solution that contains 0.25 M chloroacetic acid (...

Calculate the pH of a buffer solution that contains 0.25 M chloroacetic acid (...

Which one of the following combinations CANNOT function as a buffer solution?
...

Which one of the following combinations CANNOT function as a buffer solution? ...

When to use the Henderson-Hasselbalch Equation


	Anytime we have a buffer we ...

When to use the Henderson-Hasselbalch Equation Anytime we have a buffer we ...

Determine how many grams of potassium hypochlorite, KClO (MW: 90.55 ), you wou...

Determine how many grams of potassium hypochlorite, KClO (MW: 90.55 ), you wou...

Which of the following buffer systems would you use to create a buffer with a ...

Which of the following buffer systems would you use to create a buffer with a ...

Find the pH of a buffer solution made by mixing 100 mL of 0.20 M methylamine, ...

Find the pH of a buffer solution made by mixing 100 mL of 0.20 M methylamine, ...

Over what pH range will an oxalic acid (H 2C2O4) / sodium oxalate (NaHC2O4) so...

Over what pH range will an oxalic acid (H 2C2O4) / sodium oxalate (NaHC2O4) so...

Which weak acid-conjugate base combination would be the best to create a solut...

Which weak acid-conjugate base combination would be the best to create a solut...

A buffer solution is made by combining a weak acid with its conjugate salt. Wh...

A buffer solution is made by combining a weak acid with its conjugate salt. Wh...

Explain why the salt of a weak acid, as well as the acid itself, must be prese...

Explain why the salt of a weak acid, as well as the acid itself, must be prese...

A solution contains 1.00 mole of acetic acid and has pH = 2.50. How many grams...

A solution contains 1.00 mole of acetic acid and has pH = 2.50. How many grams...

You add a small amount of HCl to a solution of 0.20 M HBrO and 0.20 M NaBrO. W...

You add a small amount of HCl to a solution of 0.20 M HBrO and 0.20 M NaBrO. W...

You wish to prepare an HC 2H3O2 buffer with a pH of 4.24. If the pK a of is 4....

You wish to prepare an HC 2H3O2 buffer with a pH of 4.24. If the pK a of is 4....

Identify a good buffer.

A) small amounts of both a weak acid and its conjugat...

Identify a good buffer. A) small amounts of both a weak acid and its conjugat...

Two compounds, HA & HB have the same K a value. If a solution is prepared ...

Two compounds, HA & HB have the same K a value. If a solution is prepared ...

Consider a buffer composed of a mixture of acetic acid and sodium acetate in e...

Consider a buffer composed of a mixture of acetic acid and sodium acetate in e...

Which of the following weak acids would be BEST to use to make a buffer of

pH...

Which of the following weak acids would be BEST to use to make a buffer of pH...

Which of the following weak acids would be BEST to use to make a buffer of pH ...

Which of the following weak acids would be BEST to use to make a buffer of pH ...

How much sodium lactate NaC3H3O3, should be added to 583.58 mL of a 0.473 M la...

How much sodium lactate NaC3H3O3, should be added to 583.58 mL of a 0.473 M la...

What is the pH of a solution which is 0.400 M in dimethylamine (CH 3)2NH) and ...

What is the pH of a solution which is 0.400 M in dimethylamine (CH 3)2NH) and ...

Which one of the following pairs of substances cannot be mixed together (in an...

Which one of the following pairs of substances cannot be mixed together (in an...

If a biochemist wishes to prepare a buffer that will be effective at a pH of 3...

If a biochemist wishes to prepare a buffer that will be effective at a pH of 3...

What is the pH of a solution of 0.46 M acid and 0.36 M of its conjugate base i...

What is the pH of a solution of 0.46 M acid and 0.36 M of its conjugate base i...

What is the effective pH range of the pyridine/pyridinium chloride buffer? For...

What is the effective pH range of the pyridine/pyridinium chloride buffer? For...

A student is asked to prepare a buffer solution at pH = 8.60 using one of the ...

A student is asked to prepare a buffer solution at pH = 8.60 using one of the ...

The pH of a sodium acetate-acetic acid buffer is 4.50. Calculate the ratio of ...

The pH of a sodium acetate-acetic acid buffer is 4.50. Calculate the ratio of ...

Which one of the following pairs, when mixed, do not form a buffered solution?...

Which one of the following pairs, when mixed, do not form a buffered solution?...

Which of the following acids and their conjugate base would form a buffer with...

Which of the following acids and their conjugate base would form a buffer with...

Calculate the pH of a solution that is 0.210M in nitrous acid and 0.290M in po...

Calculate the pH of a solution that is 0.210M in nitrous acid and 0.290M in po...

Calculate the pH of a buffer that is 0.145M in acetic acid and 0.202M in sodiu...

Calculate the pH of a buffer that is 0.145M in acetic acid and 0.202M in sodiu...

Which of the following acids and their conjugate base would form a buffer with...

Which of the following acids and their conjugate base would form a buffer with...

The Henderson–Hasselbalch (H-H) equation is a clever rearrangement of the  Ka ...

The Henderson–Hasselbalch (H-H) equation is a clever rearrangement of the  Ka ...

Which of the following solutions is a good buffer system?

A) A solution that ...

Which of the following solutions is a good buffer system? A) A solution that ...

Which of the following is TRUE?

A) An effective buffer has a [base]/[acid] ra...

Which of the following is TRUE? A) An effective buffer has a [base]/[acid] ra...

Calculate the pH of a buffer that is 0.225 M HC 2H3O2 and 0.162 M KC2H3O2. The...

Calculate the pH of a buffer that is 0.225 M HC 2H3O2 and 0.162 M KC2H3O2. The...

How many moles of solid NaF would have to be added to 1.0 L of 1.90   M HF sol...

How many moles of solid NaF would have to be added to 1.0 L of 1.90   M HF sol...

A solution was made by dissolving 0.1219 moles of sodium acetate in 200.0 mL o...

A solution was made by dissolving 0.1219 moles of sodium acetate in 200.0 mL o...

How many moles of solid NaF would have to be added to 1.0 L of 1.90 M HF solut...

How many moles of solid NaF would have to be added to 1.0 L of 1.90 M HF solut...

Consider a solution consisting of the following two buffer systems:

H2CO3    ...

Consider a solution consisting of the following two buffer systems: H2CO3    ...

What is the pH of a solution that is 0.2 M in acetic acid (Ka= 1.8 x 10  -5) a...

What is the pH of a solution that is 0.2 M in acetic acid (Ka= 1.8 x 10  -5) a...

Which of the following combinations can result in the formation of a buffer?

...

Which of the following combinations can result in the formation of a buffer? ...

To create a buffer that maintains a pH around 7.54, which solution would you c...

To create a buffer that maintains a pH around 7.54, which solution would you c...

Which of the following combinations can result in the formation of a buffer?

...

Which of the following combinations can result in the formation of a buffer? ...

Which of the following is TRUE?

a) An effective buffer has a [base]/[acid] ra...

Which of the following is TRUE? a) An effective buffer has a [base]/[acid] ra...

Which weak acid-conjugate base combination would be the best to create a solut...

Which weak acid-conjugate base combination would be the best to create a solut...

A buffer solution is comprised of 50.0 mL of a 0.100 M HC 2H3O2 and 60.0 mL of...

A buffer solution is comprised of 50.0 mL of a 0.100 M HC 2H3O2 and 60.0 mL of...

A buffer:

a. can be made by a combination of a strong acid and strong base.

...

A buffer: a. can be made by a combination of a strong acid and strong base. ...

An aqueous solution contains 0.26M hydrocyanic acid, HCN. One liter of this so...

An aqueous solution contains 0.26M hydrocyanic acid, HCN. One liter of this so...

A buffer is prepared using 0.085M formic acid and 0.085M sodium formate. Which...

A buffer is prepared using 0.085M formic acid and 0.085M sodium formate. Which...

Which of the following acids and their conjugate base would form a buffer with...

Which of the following acids and their conjugate base would form a buffer with...