Acids and Bases: Definition and determination of pH and Ka for weak acids

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Last updated 12:18 PM on 4/10/26

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pH formula

−log₁₀[H⁺]

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Low pH

Large concentration of H⁺ions

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High pH

Small concentration of H⁺ions

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[H⁺] formula

10^-pH

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Ka formula

[H⁺][A^-]/[HA] = [H⁺]²/[HA]

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Units of Ka

mol dm^-3

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pK_a formula

-log₁₀K_a