Question

A mixture contains 0.05 moles each of CH3COONa and CH3COOH. Its pH will be (pKa of CH3COOH = 4.74)

Options
1. 4.74
2. 2.26
3. 11.26
4. 7.26

Answer 1

$\huge\bigstar\underline\Orange{Answer}$

★ It's a case of weak acid + it's salt with strong base.

PH = Pka + log|salt|/|acid|

=> PH = 4.72 + log (0.05/0.05)

PH = 4.72

happy to help !

Answer 2

Answer:

PH = Pka + log|salt|/|acid|

=> PH = 4.72 + log (0.05/0.05)

PH = 4.72