Word Equations And Balancing
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1
2KEY
Word Equations and Balancing
Name - __________KEY__________
1.) Rewrite the following sentences, first as chemical word equations and then as chemical formula equations.
a.) Sodium carbonate reacts with hydrogen chloride to produce sodium chloride, carbon dioxide and water.
Sodium carbonate + hydrogen chloride
sodium chloride + carbon dioxide + water
Na
CO
+ HCl
NaCl + CO
+ H
O
2
3
2
2
b.) Octane (C
H
) burns by reacting with pure oxygen gas to produce carbon dioxide and water.
8
18
Octane (C
H
) + oxygen gas
carbon dioxide + water
8
18
2 C
H
+ 25 O
16 CO
+ 18 H
O
8
18
2
2
2
c.) Sodium metal reacts with water to form sodium hydroxide and hydrogen gas.
Sodium metal + water
sodium hydroxide + hydrogen gas
2 Na + 2 H
O
2 NaOH + H
2
2
d.) Zinc metal reacts with copper (II) sulphate to produce zinc sulphate and copper metal.
Zinc metal + copper (II) sulphate
zinc sulphate + copper metal
2 Zn + CuSO
Zn
SO
+ Cu
4
2
4
2.) Rewrite and balance the following chemical equations.
a.) Propane (C
H
) reacts with oxygen gas to produce carbon dioxide and water.
3
8
C
H
+ 5 O
3 CO
+ 4 H
O
3
8
2
2
2
b.) Calcium oxide reacts with hydrogen chloride to form calcium chloride and water.
CaO + 2 HCl
CaCl
+ H
O
2
2
1
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