Question

In the reaction, $HNO _{3}+ H _{2} O \rightleftharpoons H _{3} O ^{+}+ NO _{3}^{-},$ the conjugate base of $HNO _{3}$ is

• A. $H _{2} O$
• B. $H _{3} O ^{+}$
• C. $NO _{3}^{-}$
• D. $H _{3} O ^{+}$ and $NO _{3}^{-}$

Answer 1

Answer: (C)

$\underset{\text{Acid}}{{HNO_{3}}}+\underset{\text{Base}}{{H_{2}O}} \rightleftharpoons \underset{\text{Conjugate acid}}{{H_{3}O^{+}}}+\underset{\text{Conjugate Base}}{{NO^{-}_{3}}}$