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Making Salts Worksheet-1452167307

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Name:…………………………………………………….
Date: ……………………
Making Salts Worksheet
This worksheet accompanies Making Salts Summary
and Precipitation Reactions Summary.
1. When an acid reacts with a base, a neutralisation reaction occurs, producing a
salt. Using the following equation, name the salts that are produced
in the acid-base reactions.
acid + base
salt
a) hydrochloric acid + ammonia → ………………………
b) nitric acid + sodium hydroxide → ………………………
c) phosphoric acid + potassium hydroxide →………………………
2. There are three other ways of making salts from acids. Complete the following
equations to illustrate them.
a) acid + metal → salt + ………………………
b) acid + ……………………… → salt + water
c) acid + carbonate → salt + ……………………… + water
3. Use the above information to complete the following reactions that form soluble salts
using acids.
a) iron oxide + sulfuric acid → ……………………… + water
b) ……………………… + hydrochloric acid → magnesium chloride + H2O + CO2
c) zinc + ……………………… → zinc nitrate + hydrogen
4. Name two ways in which salt is used by humans in everyday life.
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© Boardworks Ltd 2011
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Name:…………………………………………………….
Date: ……………………
5. A student conducts an experiment to obtain the salt zinc nitrate from zinc oxide
powder (ZnO). He adds the powder spoon by spoon into a flask containing 1M of nitric
acid (HNO3).
a) Describe what happens to the first spoonfuls of powder when he mixes it with the acid.
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b) Describe what would happen if the student kept adding zinc oxide to the nitric acid
after the reaction between the acid and metal oxide was complete.
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c) Write a word and symbol equation to show the results of this experiment.
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6. Fill in the missing symbols and balance the following equations for making salts.
a) 2Na + Cl2 → ………… NaCl
b) Al2O3 (s) + 3H2SO4 (aq) → Al2(SO4)3 (……) + 3H2O (l)
c) H3PO4 (aq) + ….KOH(s) → K3PO4(aq) + … H2O(I)
d) LiOH + HNO3 → LiNO + ………… + H2O
e) Ba(OH)2 + H2SO … → BaSO4 + 2H2O
f) …………HNO3 + Mg(OH)2 → Mg(NO3)2 + 2H2O
© Boardworks Ltd 2011
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Name:…………………………………………………….
Date: ……………………
7. Most precipitation reactions are very fast reactions that occur between ions. They
occur when two solutions of ions react to form an insoluble solid called a precipitate.
a) Complete the symbol equation for the precipitation reaction between lead nitrate and
potassium iodide that produces the insoluble salt lead iodide.
Pb(NO3)2 (aq) + 2Kl(aq) → Pbl2 (s) + ………………… (aq)
b) Complete the ionic equation for this reaction.
Pb2+ + 2NO3(-)+ 2K+ + 2l- → …………………
8. Sodium hydroxide was poured into a test tube containing a colourless solution. The
metal’s hydroxide precipitate turned the solution blue.
a) Identify the metal ion present in the colourless solution. Circle your answer.
Fe2+
Cu2+
Fe3+
b) In another experiment, dilute hydrochloric acid was poured into a test tube containing
a colourless solution. The acid’s hydrogen ions reacted with the metal ions in the
solution and produced the gas sulfur dioxide.
Balance the ionic equation for this reaction.
SO32- +
H+ (aq)
→ SO2 (g) + H2O (l)
c) Write a balanced ionic equation for the reaction between Cu2+ and OH-.
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10. a) Negative ions in salts can be identified in a solution by adding a reagent. Describe
an experiment to show that sulfite ions (SO32-) are present in a solution.
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b) Write the ionic equation for this reaction.
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© Boardworks Ltd 2011
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