WRITING AND BALANCING CHEMICAL EQUATIONS part 1
NAME_________________________PER___
Write chemical equations for the chemical reactions below.
Keep in mind these symbols: (s) = solid, (l) = liquid, (g) = gas, and (aq) = aqueous (dissolved in liquid)
Label the type of reaction in the column on the right: synthesis reaction, decomposition reaction, combustion reaction, single
replacement reaction, or double replacement reaction.
TYPE OF REACTION
1. Ammonia (NH3) liquid reacts with aqueous hydrochloric acid to form
ammonium chloride – a solid.
Word equation:
Skeletal equation:
2. When heated, solid calcium carbonate changes to form calcium oxide solid and carbon dioxide gas.
Word equation:
Skeletal equation:
3. Nitrogen gas combines with hydrogen gas to form liquid nitrogen trihydride (ammonia).
Skeletal equation:
Balanced equation:
4. Acetaldehyde (CH3CHO) liquid slowly changes to form methane gas (CH4) and carbon monoxide gas.
Skeletal equation:
Balanced equation:
5. Ethylene gas(also known as dicarbon tetrahydride) and oxygen gas in the presence of a spark form
carbon dioxide gas and water vapor.
Skeletal equation:
Balanced equation:
6. Factories change aluminum oxide (aka Dialuminum trioxide) into aluminum metal and oxygen gas
using great amounts o electricity, making aluminum fairly expensive.
Skeletal equation:
Balanced equation:
7. When chlorine gas is bubbled up through a solution of aluminum bromide, aluminum trichloride
precipitates out with bromine gas bubbling out as well.
Balanced equation:
8. Aqueous silver nitrate is poured over solid nickel metal and solid silver forms with
nickel(II) nitrate staying dissolved in solution.
Balanced equation:
9. When acetylene gas (C2H2) is lit in a welding torch, it burns to form carbon dioxide and water.
Balanced equation:
10. When ammonium dichromate is heated it breaks apart into 4 compounds: liquid nitrogen trihydride,
liquid water, solid dichromium trioxide and oxygen gas.
Balanced equation: