Question

arrhenius defined an acid as a substance whose aqueous solution contains an excess of

○ sodium ion.

○ hydroxide ion.

○ chloride ion.

○ hydrogen ion.

question 8

6 pts

arrhenius defined base as a substance whose aqueous solution contains an excess of

○ sodium ion.

○ hydroxide ion.

○ chloride ion.

○ hydrogen ion.

Explanation:

According to Arrhenius theory, an acid is a substance that dissociates in water to produce hydrogen ions ($H^+$), so an acid's aqueous solution has an excess of hydrogen ion. A base is a substance that dissociates in water to produce hydroxide ions ($OH^-$), so a base's aqueous solution has an excess of hydroxide ion.

Answer:

For the first question (about acid): hydrogen ion.
For the second question (about base): hydroxide ion.