Acids, Bases, and pH Vocabulary

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Acid

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A substance that increases the concentration of hydrogen ions (H+) in a solution.

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Arrhenius Acid

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A substance that increases the concentration of H+ ions in aqueous solution.

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Bronsted-Lowry Acid

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A substance that donates a proton (H+) to another substance.

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Acid-Base Indicator

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A chemical that changes color depending on the pH of the solution it is in.

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Arrhenius Theory

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A theory stating that acids produce H+ ions in solution, while bases produce OH- ions.

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Base

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A substance that increases the concentration of hydroxide ions (OH-) in a solution.

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Arrhenius Base

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A substance that increases the concentration of OH- ions in aqueous solution.

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Bronsted-Lowry Base

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A substance that accepts a proton (H+) from another substance.

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Bronsted-Lowry Theory

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A theory that defines acids as proton donors and bases as proton acceptors.

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Electrolyte

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A substance that conducts electricity when dissolved in water.