Salt Preparation

Multiple Select

Which is/are ions?

• Fe

• Fe^-

• Fe²⁺

• Fe³⁺

Multiple Select

Which is/are anions?

• Ca²⁺

• F^-

• Ne

• N^-3

Draw

Gaseous hydrogen chloride dissolves in water to produce two different ions. Give the chemical formula of each ion.

Multiple Select

Which is/are salts?

• zinc chloride

• oxygen

• hydrochloric acid

• carbon

Multiple Select

Which is/are salts?

• methane

• ammonia

• magnesium sulfate

• lead nitrate

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Multiple Choice

Method 1 is used to prepare a soluble salt, and the starting materials are soluble in water.

• True

• False

Open Ended

The salt magnesium sulfate forms soluble crystals.

​Describe how a pure sample of these crystals can be prepared from insoluble magnesium oxide. [4]

​Let's check!

​1. Add excess magnesium oxide to sulfuric acid and stir the mixture.

​2. Filter the resulting mixture to remove the unreacted magnesium oxide.

​3. Collect the filtrate which is magnesium sulfate.

​4. Heat the filtrate until it is saturated.

​5. Leave the filtrate to cool so that magnesium sulfate crystals can form.

​6. Filter to collect the crystals formed.

​7. Wash the crystals with a little cold water to remove impurities.

​8. Dry the crystals between a few sheets of filter paper.

Multiple Choice

Which aqueous solutions are mixed to prepare an insoluble salt?

• barium carbonate and sodium chloride

• barium nitrate and sodium chloride

• sodium nitrate and barium chloride

• sodium sulfate and barium nitrate

Open Ended

Use the following information to suggest the steps needed to prepare by precipitation pure lead(II) sulfate, starting from powdered lead(II) oxide.

- lead(II) sulfate is insoluble in water

- lead (II) oxide is insoluble in water

- lead(II) nitrate is soluble in water

​Let's check!

​1. Add excess powdered lead(II) oxide to nitric acid.

​2. Filter to remove excess unreacted lead(II) oxide.

​3. The filtrate collected is lead(II) nitrate solution.

​4. Add the lead(II) nitrate solution to excess sodium sulfate solution.

​5. Filter the mixture to collect the residue lead(II) sulfate.

​6. Wash the lead(II) sulfate with a little distilled water.

​7. Allow the lead(II) sulfate to dry on a piece of filter paper.

​In your notebook,

complete Test Yourself 11.1 and 11.2