Question

In: Chemistry

Buffer capacity is defined as the number of moles of a strong acid or strong base...

Buffer capacity is defined as the number of moles of a strong acid or strong base that is required to change the pH of 1 L of the buffer solution by one unit. What is the buffer capacity of a solution that is 0.12 M in acetic acid and 0.12 M in sodium acetate? ( Ka for acetic acid is 1.8 times 10^-5.)

Solutions

Expert Solution

1 L of buffer solution contains 0.12 M HA (acetic acid) and 0.12 M NaA (sodium acetate).

Now suppose we add x moles of HCl and pH decreases by 1 unit

Hence, buffer capacity is

queen_honey_blossom answered 2 years ago
Next > < Previous

Related Solutions

Buffer capacity is defined as the number of moles of a strong acid or strong base...
Buffer capacity is defined as the number of moles of a strong acid or strong base that is required to change the pH of 1 L of the buffer solution by one unit. What is the buffer capacity of a solution that is 0.12 M in acetic acid and 0.12 M in sodium acetate? ( Ka for acetic acid is 1.8 times 10^-5.)
The buffer capacity of a solution may be defined as the number of moles of H+...
The buffer capacity of a solution may be defined as the number of moles of H+ that will change the pH of 1.00 L of the buffer by 1.00 pH units. What is the buffer capacity of a solution which is 0.10 M in acetic acid (Ka = 1.8 × 10-5) and 0.30 M in sodium acetate, in units of mol (H+) per liter? Please show full work. (Answer key says 0.21 mol).
Calculate the expected buffer capacity of the acetate buffer based on the number of moles of...
Calculate the expected buffer capacity of the acetate buffer based on the number of moles of CH3CO2H in the buffer. (hint, you know the concentration and volume) In other words, how many moles of NaOH are needed to break the buffer? Does the measured buffer capacity of acetate buffer (20mL) meet your expectations? pKa = 4.74 target pH= 4.9 [HA]= 2.04x10-2 M [A] = 2.96x10^-2 M
BUFFER PROBLEMS 3. Start with either the conjugate acid or base and add a strong base...
BUFFER PROBLEMS 3. Start with either the conjugate acid or base and add a strong base or strong acid (conjugate acid plus strong base forms the conjugate base and water; conjugate base plus strong acid forms the conjugate acid): What is the pH of 0.5 L of a 0.1 M acetic acid solution to which 0.73 g of NaOH are added? The pKa of acetic acid is 4.76.
2. Buffer capacity refers to the amount of acid or base a buffer can “absorb” without...
2. Buffer capacity refers to the amount of acid or base a buffer can “absorb” without a significant pH change. It is governed by the concentrations of the conjugate acid and base forms of the buffer. A 0.5 M buffer will require five times as much acid or base as a 0.1 M buffer for given pH change. In this problem you begin with a buffer of known pH and concentration and calculate the new pH after a particular quantity...
I need to calculate the buffer capacity in acid and in a base from these data....
I need to calculate the buffer capacity in acid and in a base from these data. Then I need to write a short paragraph ( 7 sentences) explaining what happen and why one is better buffer that the other. Buffer Capacity = (number of moles of OH- or H3O+ added)                    (pH change)(volume of buffer in L) Buffer capacity in acid 25.0 ml of 0.10M acetic acid and 0.10 M Sodium acetate solution Buffer Volume 25.0mL Buffer pH 4.5 Buffer capacity...
classify each substance as a strong acid , weak acid , strong base or weak base...
classify each substance as a strong acid , weak acid , strong base or weak base KOH, Ca(OH)2, H 2SO4, HI, HCOOH, NaOH, HCN, C5H5N
Classify each substance as a strong acid , weak acid strong base or weak base for...
Classify each substance as a strong acid , weak acid strong base or weak base for the following compounds HI C5H5N NaOO HCOOH KOH Ca(OH)2 H2SO4 HCN
What is the difference between a strong acid and a weak acid and a strong base...
What is the difference between a strong acid and a weak acid and a strong base and a weak base?
Buffer capacity is a measure of a buffer solution's resistance to changes in pH as strong...
Buffer capacity is a measure of a buffer solution's resistance to changes in pH as strong acid or base is added. Suppose that you have 175 mL of a buffer that is 0.140 M in both formic acid (HCOOH) and its conjugate base (HCOO-). Calculate the maximum volume of 0.460 M HCl that can be added to the buffer before its buffering capacity is lost.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT