Home
Class 11
CHEMISTRY
pH of a buffer solution decreases by 0.0...

pH of a buffer solution decreases by 0.02 units when 0.12g of acetic acid is added to 250mL of a buffer solution of acetic acid and potassium acetate at `27^(@)`C. The buffer capacity of the solution is

A

`0.1`

B

10

C

1

D

`0.4`

Text Solution

Verified by Experts

The correct Answer is:
D
No. of moles of acetic acid = `0.12//60 = 2 xx 10^(-3)`
Buffer Capacity
`= ("No . of moles of acid added per litre of solution")/("Change in pH units")`
`phi = (2xx10^(-3)//250 xx10^(-3)" moles/L")/(0.02)`
`phi = 0.4`
Promotional Banner

Similar Questions

Explore conceptually related problems

When a small amount of HCI is added to a buffer solution of acetic acid and sodium acetate

10 ml of 0.2 M acid is added to 250 ml of a buffer solution with pH = 6.34 and the pH of the solution becomes 6.32 . The buffer capacity of the solution is :

When 0.1 mole of an acid is added to 2 L of a buffer solution, the P^(H) of the buffer decreases by 0.5 . The buffer capacity of the solution is

When 0.2 mole of an acid is added to 4 lit of a buffer solution, the P^(H) of the buffer decreases by 0.5 . What is the buffer capacity of the solution.?

If NaOH is added to a solution of acetic acid

When 0.002mol of acid is added to 250 mL of a buffer solution, pH decreases by 0.02 units. The buffer capacity of the system is

0.002 moles of an acid is added to a litre of buffer solution, decreases the pH of the buffer by 0.02 . Then the buffer capacity is