Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 3 Chemical Reactions - Study Questions: 4

Answer

a) $2Cr + 3Cl_{2} → 2CrCl_{3}$ b) $SiO_{2} + 2C → Si + 2CO$ c) $3Fe + 4H_{2}O → Fe_{3}O_{4} + 4H_{2}$

Work Step by Step

a) $2Cr + 3Cl_{2} → 2CrCl_{3}$ two moles of chromium reacts with three moles of chlorine to form two moles of chromium chloride. b) $SiO_{2} + 2C → Si + 2CO$ one mole of silica reacts with two moles of carbon to free the silicon and oxidize the carbon as carbon monoxide. c) $3Fe + 4H_{2}O → Fe_{3}O_{4} + 4H_{2}$ three moles of iron in pure state oxidizes with four moles of water to form one mole of ferric oxide and four moles of hydrogen.
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