Lesson 4.4.2.3
4.4.2.3 Soluble salts Quiz: AQA Chemistry, Unit 4
20 questions
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Lesson 4.4.2.3, Soluble salts: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 4: Chemical changes, written with Revision Ninja.
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The 20 questions
-
What type of solid is added to dilute acid when making a soluble salt?
- Insoluble limiting
- Insoluble excess
- Soluble limiting
- Soluble excess
-
What does the filtrate contain after filtering excess solid from a salt solution?
- Undissolved metal
- Insoluble carbonate
- Pure distilled water
- Dissolved soluble salt
-
How is a dry solid salt obtained from a salt solution?
- Reduction
- Titration
- Crystallisation
- Distillation
-
Which solid would react with hydrochloric acid to make a soluble salt?
- Zinc oxide
- Gold
- Silver
- Silicon dioxide
-
What equipment is used to evaporate the salt solution gently?
- Bunsen burner
- Water bath
- Measuring cylinder
- Liebig condenser
-
Why is an excess of solid added when preparing a soluble salt?
- To form pure crystals
- To increase pH levels
- To react all acid
- To cool the solution
-
Using dilute hydrochloric acid and magnesium carbonate, which salt solution forms?
- Magnesium chloride
- Magnesium hydroxide
- Magnesium carbonate
- Magnesium oxide
-
Why should heating stop before a salt solution is completely dry during crystallisation?
- To prevent melting
- To prevent spitting
- To speed cooling
- To stop dissolution
-
Which apparatus separates the excess insoluble solid from the solution?
- Filter paper
- Measuring cylinder
- Delivery tube
- Fractionating column
-
What is the correct order to prepare a pure, dry salt?
- Crystallise, react, filter
- Evaporate, filter, react
- React, filter, evaporate
- Filter, react, crystallise
-
Which salt forms when calcium carbonate reacts with dilute nitric acid?
- Calcium sulfate
- Calcium oxide
- Calcium nitrate
- Calcium chloride
-
A student reacts excess zinc with dilute sulfuric acid, then filters. What is left on the filter paper?
- Excess zinc
- Zinc sulfate
- Water
- Hydrogen
-
Why is a water bath used to evaporate a salt solution?
- Freezing point
- Gentle heating
- High pressure
- Rapid boiling
-
What property must a salt have to be prepared using an insoluble base?
- Insoluble in water
- Strongly acidic
- Highly volatile
- Soluble in water
-
What physical property defines a soluble salt?
- Melts very easily
- Conducts solid state
- Forms neutral gas
- Dissolves in water
-
Why is dilute acid used rather than concentrated acid in salt preparation?
- Stops crystallisation
- Controls reaction speed
- Produces no water
- Increases yield
-
What happens to the excess solid added during salt preparation?
- Evaporates away
- Dissolves completely
- Turns into gas
- Stays unreacted
-
Which two processes are needed after the reaction to obtain a dry soluble salt?
- Filtration and evaporation
- Distillation and titration
- Electrolysis and cooling
- Titration and filtration
-
Which reactants are combined to prepare a soluble salt by neutralisation?
- Acid and base
- Alkalis only
- Water and salt
- Acid and metal
-
Hydrochloric acid is used to make a salt. Which negative ion must the salt contain?
- Carbonate
- Sulfate
- Chloride
- Nitrate
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