Name: _____________________________________
Date: ________________________________
Science 10: Chemistry
Balancing Equations Worksheet #2
Skeleton Equations are equations that are unbalanced, meaning they do not
have an equal amount of each element on both sides of the equation
Symbols to indicate state of compound:
(s) – solid
(g) – gas
(l) –
liquid
(aq) – aqueous (dissolved in water)
Any diatomic element found by itself must have a subscript of 2!
Task #1: Covert the following word equations to skeleton equations. Be sure to include to state of matter that each
compound as a subscript. Also, state the type of reaction that takes place.
Example: Silver nitrate + copper  silver + copper nitrate
Solution: AgNO3 (aq) + Cu(s)  Ag(s) + Cu(NO3)2 (aq)
This is a single displacement reaction
(a) Iron + sulphur  Iron(II) sulphide
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(b) Hydrogen gas + chlorine gas  hydrogen chloride
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(c) Magnesium + oxygen gas  magnesium oxide
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(d) Aluminum oxide  aluminum + oxygen gas
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(e) Hydrogen gas + oxygen gas  water
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(f) Hydrochloric acid + sodium hydroxide  sodium chloride + water
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(g) Methane gas + oxygen gas  carbon dioxide + water
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(h) Potassium hydroxide + hydrogen bromide  potassium bromide + water
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(i) Carbon + oxygen gas  carbon dioxide
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(j) Tin (II) oxide + hydrogen gas  tin + water
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(k) Write your own word equation, then write the skeleton equation for it
(l) Write your own word equation, then write the skeleton equation for it