Given below are two statements:Statement-I: p | vedclass

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(C) Statement-$I$ is incorrect. For a very dilute solution of a strong acid like $HCl$ $(1.0 	imes 10^{-8} \ M)$,the contribution of $H^{+}$ ions fro

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Statement-$I$ is incorrect but Statement-$II$ is correct

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(C) Statement-$I$ is incorrect. For a very dilute solution of a strong acid like $HCl$ $(1.0 	imes 10^{-8} \ M)$,the contribution of $H^{+}$ ions from the auto-ionization of water cannot be neglected.The total $[H^{+}] = [H^{+}]_{HCl} + [H^{+}]_{water} = 10^{-8} + 10^{-7} \approx 1.1 	imes 10^{-7} \ M$.Therefore,$pH = -\log(1.1 	imes 10^{-7}) \approx 6.96$,which is not $8$.Statement-$II$ is correct. $HCl$ is a strong acid that dissociates completely in water,and the definition of $pH$ is indeed $-\log[H^{+}]$.

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