Question

What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?

(a) 2.0

(b) 7.0

(c) 1.04

(d) 12.65

Answer 1

The correct option is: (d) 12.65

Explanation:

One mole of NaOH is completely neutralised by one mole of HCl. 

Hence, 0.01 mole of NaOH will be completely neutralised by 0.01 mole of HCl.

=> NaOH left unneutralised = 0.1 - 0.01 = 0.09 mol As equal volumes of two solutions are mixed,