Chemistry 9th Edition

by Zumdahl, Steven S.; Zumdahl, Susan A.

Published by Cengage Learning

ISBN 10: 1133611095

ISBN 13: 978-1-13361-109-7

Chapter 4 - Types of Chemical Reactions and Solution Stoichiometry - Active Learning Questions - Page 179: 1

Answer

$Mg (s) + 2HCl (aq) → MgCl_2(aq) + H_2(g)$

Work Step by Step

When solid Magnesium is dropped into aqueous Hydrogen Chloride ($HCl$), the magnesium would disappear/dissolve into the chlorine, creating aqueous $MgCl_2$. Alongside this, hydrogen gas is released, with the formula $H_2$. This final equation can be balanced by changing the coefficient of $HCl$ to 2, this allows for both sides of the equation to have equal amounts of atoms. $Mg (s) + 2HCl (aq) → MgCl_2(aq) + H_2(g)$

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