If the pH of pure water is 7, then the hydrogen ion concentration, [H+] in mol L−1 will be:
7
0
10−7
10+7
A
0
B
10+7
C
10−7
D
7
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Solution
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We know that pH=−log[H+]
Given, pH=7
So, 7=−log[H+]
log[H+]=−7⟹[H+]=10−7
Hence, the hydrogen ion concentration is 10−7 mol L−1.
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