Equilibrium Question 490

Question: The pH of a 1010 molar HCl solution is approximately [NCERT 1977]

Options:

A) 10

B) 7

C) 1

D) 14

Show Answer

Answer:

Correct Answer: B

Solution:

1010MHCl=1010,M,[H+] . But pH 10 because solution is acidic. This is because H+ from H2O(107M) cannot be neglected. Total [H+]=107+1010

=107+(1+103)=107(1.001) That is why pH=7 (slightly less than 7)



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