question_answer

What is the pH of the resulting solution when equal volumes of 0.1 M \[NaOH\] and M HCl are mixed?                                                                                                                                                    [NEET 2015 (Re)]

A)  12.65            

B)       2.0                  

C)  7.0            

D)  1.04

Correct Answer: A

Solution :

Key concept When equal volumes of acid and base are mixed, then resulting solution become alkaline if concentration of base is taken high.

Let normality of the solution after mixing 0.1 M

is N.

or

Since, normality of  is more than that of HCl.

Hence, the resulting solution is alkaline.

or

or