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What characterizes an Arrhenius acid?OA. It is always a strong acid.OB. It is made from a salt.OC. It has a pH of 7 in water.OD. It produces hydrogen ions.4

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Explanation:

Arrhenius acid:

According to this theory, an Arrhenius acid is a compound that in an aqueous solution produces or increases hydrogen ions (H+).

Answer: OD. It produces hydrogen ions.