Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 17 - Section 17.1 - The Common Ion Effect - Checkpoint - Page 782: 17.1.1

Answer

(a) $NaNO_2$ and (c) $Ca(NO_2)_2$

Work Step by Step

According to the common ion effect, when we add the conjugate base $(NO{_2}^-)$ to an acid ($HNO_2$) solution, the percent ionization will decrease, because the equilibrium will shift to the reactants side.
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