ACID - Releases hydrogen ions in solution, BASE - Releases hydroxide ions in solution, ALKALI - A soluble base, CONCENTRATION - pH is a measure of the _____________ of hydrogen ions, LOWER - Acids have a pH _____________ than 7, HIGHER - Bases have a pH ____________ than 7, STRONG - _____________ acids release hydrogen ions more readily, NEUTRAL - Substances with pH of 7,

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