Which of the following will have the lowest pH?

CH₃COOH

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NaOH

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NaHCO₃

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CH₃COONa

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Solution

The correct option is A
CH₃COOH

CH₃COOH will have the lowest pH since it is an acid (pH < 7).

NaOH is a base (pH > 7)

CH₃COONa is a basic salt (pH > 7)

NaHCO₃ is a base (pH > 7).

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