1. An acid is a compound or a substance that increases the concentration of hydrogen ions. It is also said to be a proton donor. When an acid is dissolved in water, a solution is formed with a hydrogen ion activity greater than in pure water.
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2. The ph process of changing from an alkaline to an acid
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3. The change of color from a substance added.
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4. Corrosive things eat away at metals and other substances.
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5. One hydrogen atom and one oxygen atom.
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