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(C) The $pH$ of a solution is inversely proportional to the concentration of $H^+$ ions. Higher $[H^+]$ means lower $pH$,and lower $[H^+]$ means highe

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$M/20 \ H_2SO_4, M/10 \ HNO_3, M/40 \ HClO_4$

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(C) The $pH$ of a solution is inversely proportional to the concentration of $H^+$ ions. Higher $[H^+]$ means lower $pH$,and lower $[H^+]$ means higher $pH$.For a mixture of strong acids,the total $[H^+]$ is the sum of the concentrations of $H^+$ contributed by each acid.$A: [H^+] = 2(M/10) + (M/20) + (M/10) = 0.2 + 0.05 + 0.1 = 0.35 \ M$$B: [H^+] = 2(M/20) + (M/10) + (M/20) = 0.1 + 0.1 + 0.05 = 0.25 \ M$$C: [H^+] = 2(M/20) + (M/10) + (M/40) = 0.1 + 0.1 + 0.025 = 0.225 \ M$$D: [H^+] = 2(M/20) + (M/5) + (M/5) = 0.1 + 0.2 + 0.2 = 0.5 \ M$Comparing the total $[H^+]$ values,mixture $C$ has the lowest concentration of $H^+$ ions $(0.225 \ M)$,therefore it will have the highest $pH$.

Given the concentrations of different acids in the following mixtures,which mixture has the highest $pH$?

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