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(C) The $pH$ scale ranges from $0$ to $14$. Substances with $pH > 7$ are basic,and higher concentration of $OH^-$ ions leads to a higher $pH$. $1 \, M

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$1 \, M \, NaOH$

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(C) The $pH$ scale ranges from $0$ to $14$. Substances with $pH > 7$ are basic,and higher concentration of $OH^-$ ions leads to a higher $pH$. $1 \, M \, NaOH$ is a strong base that completely dissociates to provide a high concentration of $OH^-$ ions,resulting in a $pH$ of $14$. $1 \, M \, NH_3$ is a weak base with a $pH$ significantly lower than $14$. Distilled water is neutral with a $pH$ of $7$. Chlorine saturated water is acidic due to the formation of $HCl$ and $HOCl$,resulting in a $pH Therefore,$1 \, M \, NaOH$ has the highest $pH$.

Which of the following will have the highest $pH$?

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