## Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning

# Chapter 3 - Chemical Reactions - Questions for Review and Thought - Topical Questions - Page 148b,: 20b

#### Answer

$B_2O_3+6HF --> 2BF_3 +3H_2O$

#### Work Step by Step

When balancing chemical reactions, it is often best to use a "guess and check" method. For example, if you see that there are 8 hydrogen atoms on one side and 4 hydrogen atoms on the reactants side, multiply the reactant with the 4 hydrogen atoms by 2. Then, count the number of atoms of each element on each side. Continue this process until you obtain an equation that is completely balanced. This gives: $B_2O_3+6HF --> 2BF_3 +3H_2O$

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