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Properties of Acids

Consider KA, ...

Question

Consider KA, the potassium salt of a weak acid HA. If a sample of KA is dissolved in water, with no other substances added, which of the following statements is true (approximately)?

[H₃O⁺] = [OH^-]

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[HA] = [K⁺]

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[HA] = [OH^-]

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[H₃O⁺] = [A^-]

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Solution

The correct option is C
[HA] = [OH^-]

[HA] = [OH^-]

The reaction is: A^- + H₂O ⇌ HA + OH^-

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