Calculate the pH of CH3OONa at 25o if the concentration of CH3COONa is 0.01M . (Given pKa of acetic acid is 4.74 ).

Question

Calculate the pH of CH3OONa at 25o if the concentration of CH3COONa is 0.01M . (Given pKa of acetic acid is 4.74 ). (A) 3.37 (B) 4.37 (C) 4.74 (D) 0.474

Tardigrade Admin · Accepted Answer

mathrmpH=7+(1/2) mathrmpka+(1/2) operatornamelogc =7+(1/2) × 4.74+(1/2) log (10-2) ∴ mathrmpH=8.37

Q. Calculate the $p H$ of $C H_{3} OON a$ at $2 5^{o}$ if the concentration of $C H_{3} COON a$ is $0.01 M$ . (Given $p K_{a}$ of acetic acid is $4.74$ ).

$3.37$

$4.37$

$4.74$

$0.474$

$pH = 7 + \frac{1}{2} pka + \frac{1}{2} logc$
$= 7 + \frac{1}{2} \times 4.74 + \frac{1}{2} lo g (1 0^{- 2})$
$∴ pH = 8.37$

Q. Calculate the pH of CH3​OONa at 25o if the concentration of CH3​COONa is 0.01M . (Given pKa​ of acetic acid is 4.74 ).

3.37

4.37

4.74

0.474