General Chemistry 10th Edition

Published by Cengage Learning
ISBN 10: 1-28505-137-8
ISBN 13: 978-1-28505-137-6

Chapter 2 - Atoms, Molecules, and Ions - Exercises - Page 72: 2.12

Answer

$Na_2SO_4.5H_2O$

Work Step by Step

As we know that sodium thiosulfate pentahdrate is made up of $Na^{+}$ and $SO_4^{-2}$ ions and as the compound is anhydrous having penta prefix that's why there will be $5H_2O$. So the formula is $Na_2SO_4.5H_2O$
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