What substance is classified as an arrhenius base

Explanation:

According to Arrhenius concept:

A base is defined as a substance which donates hydroxide ions when dissolved in water. For example: sodium hydroxide (NaOH), potassium hydroxide (KOH).

An acid is defined as a substance which donates hydronium ions in water.For example: hydrogen chlorde (HCl), nitric acid ().

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

50.23 i believe is correct but don't quote me on that.