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Solution


Q.

The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is [Given: pKa of CH3COOH = 4.57]               [2022]

 
1 5.57  
2 3.57  
3 4.57  
4 2.57  

Ans.

(1)

It is an acidic buffer.

For acidic buffer,

pH=pKa+log[Salt][Acid] 

     =4.57+log0.10.01=4.57+log10=4.57+1=5.57