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acidic solution

more hydrogen ions than hydroxide ions


describes water and other substances that can act as both acids and bases

Arrhenius model

a model of acids and bases; states that an acid is a substance that contains hydrogen and ionizes to produce hydrogen ions in aqueous solution and a base is a substance that contains a hydroxide group ans dissociates to produce a hydroxide ion in aqueous solution

basic solution

more hydroxide ions than hydrogen ions

Bronsted-Lowry model

a model of acids and bases in which an acid is a hydrogen-ion donor and a base is a hydrogen-ion acceptor


a solution that resists changes in pH when limited amounts of acid or base are added

buffer capacity

the amount of acid or base a buffer solution can absorb without a significant change in pH

conjugate acid

the species produced when a base accepts a hydrogen ion from an acid

conjugate acid-base pair

consists of two substances related to each other by the donating and accepting of a single hydrogen

conjugate base

the species produced when an acid donates a hydrogen ion to a base

end point

the point at which the indicator that is used in a titration changes color

equivalence point

the stoichiometric point of titration

neutralization reaction

a reaction in which an acid and a base react in aqeous solution to produce a salt and water


the negative logarithm of the hydrogen ion concentration of a solution; acidic solutions have pH values between 0 and 7, basic solutions have values between 7 and 14, and a solution with a pH of 7.0 is neutral


the negative logarithm of the hydroxide ion concentration of a solution; a solution with a pOH above 7.0 is acidic, a solution with a pOH below 7.0 is basic, and a solution with a pOH of 7.0 is neutral


an ionic compound made up of a cation from a base and an anion from an acid

strong acid

an acid that ionizes completely in aqueous solution

strong base

a base that dissociates entirely into metal ions and hydroxide ions in aqeuous solution

weak base

a base that ionizes only partially in dilute aqeous solution to form the conjugate acid of the base and hydroxide

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