Writing & Balancing Equations
Name:
Period:
Write the following chemical equations using the proper formulas and then BALANCE
them. Show your atom counts.
1)
barium chloride + sodium sulfate  sodium chloride + barium sulfate
BaCl2 + Na2SO4  2NaCl + BaSO4
2)
zinc chloride + ammonium sulfide  zinc sulfide + ammonium chloride
ZnCl2 + (NH4)2S  ZnS + 2NH4Cl
3)
copper + silver sulfate  copper(II) sulfate + silver
Cu + Ag2SO4  CuSO4 + 2Ag
4)
iron(III) oxide + carbon monoxide  iron + carbon dioxide
Fe2O3 + 3CO  2Fe + 3CO2
5)
calcium hydroxide + ammonium sulfate  calcium sulfate + ammonia + water
Ca(OH)2 + (NH4)2SO4  CaSO4 + 2NH3 + 2H2O
6)
lithium hydroxide + carbon dioxide  water + lithium carbonate
2LiOH + CO2  H2O + Li2CO3
7)
silver nitrate + zinc  zinc nitrate + silver metal
2AgNO3 + Zn  Zn(NO3)2 + 2Ag
Write out each equation using correct chemical formulas. Then balance each
equation!
1) Sodium metal reacts with oxygen gas (O2) to form solid sodium oxide.
4Na(s) + O2(g)  2Na2O(s)
2) Chromium (III) chloride reacts with water to form aqueous hydrogen chloride and
solid chromium (III) hydroxide.
CrCl3(s) + 3H2O  3HCl(aq) + Cr(OH)3(s)
3) Iron metal reacts with water to form iron (III) oxide solid and hydrogen gas (H2).
2Fe(s) + 3H2O(l)  Fe2O3(s) + 3H2(g)
4) Iridium (III) chloride solution reacts with sodium hydroxide solution to form solid
iridium (III) oxide, aqueous hydrogen chloride, and sodium chloride solution.
2IrCl3(aq) + 3NaOH(aq)  Ir2O3(s) + 3HCl(aq) + 3NaCl(aq)
5) Copper metal reacts with oxygen gas (O2) to form solid copper (II) oxide.
2Cu(s) + O2(g)  2CuO(s)
6) Lithium metal reacts with oxygen gas (O2) to form solid lithium oxide.
4Li(s) + O2(g)  2Li2O(s)
7) Lead (II) nitrate solution reacts with potassium iodide solution to form lead (II)
iodide solid and potassium nitrate solution.
Pb(NO3)2(aq) + 2KI(aq)  PbI2(s) + 2KNO3(aq)
8) Ammonium nitrate decomposes to produce dinitrogen monoxide gas (N2O) and
water.
NH4NO3(aq)  N2O(g) + 2H2O(l)