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Last updated 5:38 PM on 6/5/26
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17 Terms

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Arrhenius Acid

Donates H⁺

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Arrhenius Base

Makes OH-

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Brønsted-Lowry Acid

Gives H+

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Brønsted-Lowry Base

Takes H+

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Lewis Acid

Takes electrons

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Lewis Base

Gives electrons

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pH formula

−log[H+]

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pOH

−log[OH−]

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pH+pOH

adds to 14

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[H+][OH−]=

1.0×10−14

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conjugate acid

The substance formed when a base gains an H⁺ (proton)

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conjugate base

The substance formed when an acid loses an H⁺ (proton).

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Enthalpy (ΔH)

Heat energy absorbed or released during a reaction.

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Negative ΔH

Exothermic; heat released.

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Positive ΔH

Endothermic; heat absorbed.

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Endothermic

Absorbs heat; ΔH > 0.

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Exothermic

Releases heat; ΔH < 0