Level Chemistry Transition Unit Worksheet With Answer Key - Healthcote School Page 8
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Writing symbol equations from words
Task 6:
Write symbol equations for the following reactions taking place. You will first need to convert
the names of the materials into formulae and then balance the equation.
1. Zinc metal reacts with copper sulphate solution to produce solid copper metal and
zinc sulphate solution.
Zn + CuSO
Cu + ZnSO
4
4
2. Solid calcium hydroxide reacts with solid ammonium chloride on heating to produce
solid calcium chloride, steam and ammonia gas.
Ca(OH)
+ 2NH
Cl
CaCl
+ 2H
O + 2NH
2
4
2
2
3
3. When lead (II) nitrate is heated in a dry test tube lead (II) oxide, nitrogen dioxide gas
and oxygen are produced.
2Pb(NO
)
2PbO + 4NO
+ O
3
2
2
2
4. Silicon tetrachloride reacts with water to produce solid silicon dioxide and hydrogen
chloride gas.
SiCl
+ 2H
O
SiO
+ 4HCl
4
2
2
5. When octane (C
H
) vapour is burned with excess air in a car engine carbon dioxide
8
18
and water vapour are produced.
C
H
+ 12.5O
8CO
+ 9H
O (accept multiples)
8
18
2
2
2
6. When rubidium reacts with water a solution of the hydroxide of the metal is produced
as well as hydrogen gas.
2Rb + 2H
O
2RbOH +H
2
2
7.
When strontium reacts with water a solution of the hydroxide of the metal is produced
as well as hydrogen gas.
Sr + 2H
O
Sr(OH)
+H
2
2
2
8.
Sodium chloride reacts with concentrated sulfuric acid to produce sodium hydrogen
sulphate and hydrogen chloride.
NaCl +H
SO
NaHSO
+ HCl
2
4
4
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