The pH of 10−8 M of HCl is ______.

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KollegeApply · Accepted Answer

The pH of 10−8 M of HCl is less than 7. Explanation: When the concentrations of H+ from acid and water are comparable, the concentration of H+ from water cannot be ignored in an extremely diluted acidic solution. [H+] = 10−8 + 10−7 = 10−8 (1 + 10) = 11 $\times$ 10−8 = −log (11 $\times$ 10−8) = 8 − log 11 = 8 − 1.04 = 6.96

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