# What substance is acting as the Bronsted-Lowry base in the following forward reaction? HNO_3 + H_2O -> H_3O^+ + NO_3^-?

Jul 9, 2016

The water molecule acts as the base.

#### Explanation:

The water molecule is the proton acceptor. It therefore acts as the base. Nitric acid is the proton donor; it therefore acts as the acid.