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REVISION QUESTIONS
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Chemical Reactions
1. For the following reactions - balance the equations (You may also like to classify them as combustion, precipitation, decomposition, combination, redox or displacement reactions.)
a. Fe 2O 3 (s ) + CO (g) ® FeO (s) + CO 2 (g)
b. FeO (s) + CO (g) ® Fe (s) + CO 2 (g)
c. C 12H 22O 11 (s) + O 2 (g) ® CO 2 (g) + H 2O (g)
d. Fe (s) + O 2 (g) ® Fe 2O 3 (s)
e. Ca (s) + H 2O (l) ® Ca(OH) 2 (aq) + H 2 (g)
f. Zn + HCl ® ZnCl 2 + H 2
g. KClO 3 ® KCl + O 2
h. S 8 + F 2 ® SF 6
2. Write a balanced equation for the following.
a. Aluminium metal is oxidised by oxygen to form aluminium oxide.
b. Sodium oxide reacts with carbon dioxide to form sodium carbonate.
c. Calcium metal reacts with water to form calcium hydroxide and hydrogen.
d. Barium metal reacts with Iron (III) sulfate to produce barium sulfate and iron metal.
e. Bismuth (III) oxide and zinc metal react to produce zinc (II) oxide and bismuth metal.
f. Calcium metal reacts with phosphorus to produce calcium phosphide.
g. The complete combustion of decane (C 10H 22)
h. The complete combustion of propanol (C 3H 7OH)
3. Determine if a precipitate forms when the following solutions are mixed. If so, write the net ionic equation for the reaction.
a. A solution of sodium fluoride is mixed with a solution of barium nitrate.
b. A solution of ammonium carbonate is mixed with a solution of calcium acetate.
c. A solution of potassium bromide is mixed with a solution of ammonium sulfate.
d. A solution of sodium carbonate is mixed with a solution of barium sulfate.
e. A solution of sodium chloride is added to silver nitrate solution.
f. lead (II) nitrate solution is added to potassium iodide solution.
4. Explain using chemical tests, how could you distinguish the following pairs of solutions.
a. A solution of silver nitrate and a solution of lead nitrate.
b. A solution of lead nitrate and a solution of magnesium nitrate.
c. A solution of iron(II) nitrate and a solution of iron (III) nitrate.
d. A solution of potassium iodide and a solution of potassium hydroxide.
5. Complete the following word equations and write balanced equations.
a. Magnesium + Oxygen ®
b. Aluminium + Lead (II) Nitrate ®
d. Ammonium Phosphate solution + Barium Hydroxide solution ®
e. Butane (C 4H 10) + Oxygen ®
f. Copper + Silver Nitrate ®
g. Silver Nitrate solution + Potassium Chloride solution ®
h. zinc + lead nitrate solution ®
6. Predict whether reactions will occur in the following cases. If so write complete reactions.
a. zinc + aluminium sulfate solution
b. zinc + magnesium nitrate solution
c. zinc + lead nitrate
d. copper + zinc nitrate
e. copper + silver nitrate
f. magnesium + aluminium nitrate
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