question_answer

. What is the \[[O{{H}^{-}}]\] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M \[Ba{{(OH)}_{2}}\]?                                                                                                      [AIPMT (S) 2009]

A)  0.10 M            

B)       0.40 M

C)  0.0050 M         

D)       0.12 M

Correct Answer: A

Solution :

Number of mill equivalents of HCl

Number of milliequivalents of

of final solution