Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 3 - Sections 3.1-3.12 - Exercises - Problems by Topic: 45d

Answer

Its formula is $K_{2}CO_{3}.2H_{2}O$

Work Step by Step

The cation of potassium carbonate dihydrate is $K^{+}$. The anion is carbonate, i.e $CO_{3}^{2-}$. To balance the charges, 1 $CO_{3}^{2-}$ combines with 2 $K^{+}$. Then it also has 2 (di) water molecules of hydration. So, its formula is $K_{2}CO_{3}.2H_{2}O$.
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