question_answer

Calculate the \[pOH\] of a solution at \[25{}^\circ C\] that contains \[1\times {{10}^{-10}}\,M\] of hydronium ions.                                                                                                                                       [AIPMT (S) 2007]

A)  7.00

B)                   4.00    

C)  9.00                

D)       1.00

Correct Answer: B

Solution :

pH + pOH = 14

pH = -log [H+]

pH = -log [10-10]

pH = 10

pOH + 10 = 14

pOH = 14 - 10 = 4