False. Bases increase the hydroxide ion concentration
The Arrhenius acid-base theory is a theory that suggests the classification of acid-base compounds based on the type of ion formed when the compound is added to air. A substance when added to water will show acidic or basic properties. This theory can only describe acids and bases in aqueous solutions and cannot classify acids and bases in gaseous or solid state.
According to Arrhenius a base is a compound that increases the concentration of hydroxide ions in an aqueous solution. When a substance is alkaline dissolved in water which has neutral properties, it will produce hydroxide ion OH-. While that can increase the concentration of hydrogen ions when dissolved in solution is an acid.
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