Which among the following has the highest pH? | vedclass

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Question

(A) For an aqueous solution,the $pH$ scale ranges from $0$ to $14$. Acidic solutions have $pH < 7$,neutral solutions have $pH = 7$,and basic solutions

Vedclass · Accepted Answer

$1 \ M \ NaOH$

Vedclass · Answer

(A) For an aqueous solution,the $pH$ scale ranges from $0$ to $14$. Acidic solutions have $pH  7$.Among the given options,$H_2SO_4$ and $HCl$ are strong acids,while $NaOH$ is a strong base. Therefore,the basic solutions will have a higher $pH$ than the acidic solutions.Comparing the two basic solutions ($1 \ M \ NaOH$ and $0.1 \ M \ NaOH$):For $1 \ M \ NaOH$: $[OH^-] = 1 \ M$. Thus,$pOH = -\log(1) = 0$. Since $pH + pOH = 14$,$pH = 14 - 0 = 14$.For $0.1 \ M \ NaOH$: $[OH^-] = 0.1 \ M$. Thus,$pOH = -\log(0.1) = 1$. Since $pH + pOH = 14$,$pH = 14 - 1 = 13$.Comparing the values,$1 \ M \ NaOH$ has the highest $pH$.

Which among the following has the highest $pH$?

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