Salt Preparation

Front

How is a soluble salt made?

Back

• an acid with an insoluble base.

• an acid with an alkali. (titration)

• an acid with a metal.

• an acid with an insoluble carbonate.

Front

Why is the insoluble base added in excess during the preparation of a soluble salt?

Back

The insoluble base is added in excess to ensure that all of the acid has reacted.

Front

What step is taken to remove the excess insoluble base after the reaction?

Back

The excess insoluble base is removed by filtration.

Front

What is left in the solution after the excess base is removed?

Back

After removing the excess base, only the salt and water remain in the solution.

Front

Write the balanced symbol equation for the preparation of copper(II) sulfate from copper(II) oxide.

Back

The balanced symbol equation is:

CuO (s) + H₂SO₄ (aq) ⟶ CuSO₄ (s) + H₂O (l)

Front

Define the term insoluble base.

Back

An insoluble base is a base that does not dissolve in water.

Front

How are crystals produced from a salt solution?

Back

The solution is heated gently and then left to cool.

Front

Name the method used to prepare a soluble salt from an acid and alkali.

Back

The method used to prepare a soluble salt from an acid and alkali is titration.

Front

Name the piece of equipment which could be used to measure a fixed volume of acid when preparing a soluble salt by titration.

Back

The piece of equipment which could be used to measure a fixed volume of acid is a pipette.

Front

Why is an indicator used during the preparation of a soluble salt by titration?

Back

An indicator will indicate when all acid/alkali in the flask has been neutralised.