What's the pH of a 10^-9M solution of HCL in water? - Quora
Answer (1 of 5): pH is always defined as -log[H+] Same applies in this case but since the concentration of the acid added is less, the H+ ions that are formed due to the dissociation of water cannot be neglected in this case. Ionic product of water is 10^-14 Since water is neutral, we take the...
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