A) 10
B) 7
C) 1
D) 14
Correct Answer: B
Solution :
\[{{10}^{-10}}M\,\,HCl={{10}^{-10}}\,M\,[{{H}^{+}}]\]. But pH\[\ne 10\] because solution is acidic. This is because \[{{H}^{+}}\]from \[{{H}_{2}}O({{10}^{-7}}M)\]cannot be neglected. Total \[[{{H}^{+}}]={{10}^{-7}}+{{10}^{-10}}\] \[={{10}^{-7}}+(1+{{10}^{-3}})={{10}^{-7}}(1.001)\] That is why \[pH=7\](slightly less than 7)You need to login to perform this action.
You will be redirected in
3 sec