FINAL EXERCISES
These are the final exercises that give you a chance to build your
self-confidence. No commentary is given on how to balance them.
Some of them are repeated from before but it was felt
that they should be balanced again without any commentary. They
are given in a general sequence of increasing difficulty.
To assess your skill, you may give yourself 4 points for each
equation you balance.
100 is considered a perfect score.
There is a built-in curve of 4 points.
In each exercise below, hit the UNDO button on the calculator
until the formula entry window is clear. Then type #A? through #Z? as
indicated below, hitting SUBMIT for each letter to bring up the formula.
Balance each equation so that they have all integer coefficients and the
coefficients are given in their lowest form (their common factor is one).
#A CH3COOH + NaOH => Na + CH3COO + H2O
#B HgO => Hg + O2
#C Si + Cl2 => SiCl4
#D Fe + HCl => FeCl2 + H2
#E H2S2O7 + H2O => H2SO4
#F CH4 + O2 => CO2 + H2O
#G Pb(NO3)2 + Na2SO4 => NaNO3 + PbSO4
#H Fe2O3 + C => Fe + CO
#I O3 => O2
#J C6H12O6 + O2 => CO2 + H2O
#K KClO3 => KCl + O2
#L Fe + O2 => Fe2O3
#M MnO2 + HCl => MnCl2 + Cl2 + H2O
#N Li + H2O => LiOH + H2
#O CH4 + Br2 => CBr4 + HBr
#P CuO + NH3 => Cu + H2O + N2
#Q Al + H2SO4 => Al2(SO4)3 +H2
#R C2H6 + O2 => CO2 + H2O
#S Ni(NO3)2 + NaOH => Ni(OH)2 + NaNO3
#T H2SO4 + NaOH => Na2SO4 + H2O
#U NH3 + O2 => NO + H2O
#V P4O10 + H2O => H3PO4
#W Au + KCN + O2 + H2O => KAu(CN)2 + KOH
#X C3H5N3O9 => N2 + CO2 + H2O + O2
#Y Ca5(PO4)3F + H2SO4 => Ca(H2PO4)2 + CaSO4 + HF
#Z Mg(OH)2 + HNO3 => Mg(NO3)2 + H2O
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