6 This question is about ionic and covalent compounds.

(a) Complete the word equation to show the reaction between magnesium carbonate and nitric acid.

[3]

(b) Crystals of copper(II) chloride are prepared by adding excess copper(II) oxide powder to dilute hydrochloric acid.
Describe how to prepare a sample of pure, dry copper(II) chloride crystals after the reaction is complete.
In your answer, describe how to:
- remove the excess copper(II) oxide from the reaction mixture
- crystallise the copper(II) chloride
- dry the crystals.
.
.
.
.
.
[3]

(c) (i) Fig. 6.1 shows the apparatus for the electrolysis of molten lithium iodide, using inert
electrodes.

Fig. 6.1
Label Fig. 6.1 to show the:
- anode
- molten lithium iodide.
(ii) Platinum metal is used as an inert electrode in this electrolysis experiment.
Name one other suitable material that can be used as an inert electrode.
................................................................................................................................. [1]
(iii) Name the products formed at the positive and negative electrodes when molten lithium iodide is electrolysed.
positive electrode
negative electrode
[2]

(d) Table 6.2 shows some properties of five compounds, \(\mathbf{A}, \mathbf{B}, \mathbf{C}, \mathbf{D}\) and \(\mathbf{E}\).
Table 6.2

State which two of the compounds, \(\mathbf{A}, \mathbf{B}, \mathbf{C}, \mathbf{D}\) and \(\mathbf{E}\), are simple molecules.
Give two reasons for your answer.
compounds and
reason 1
reason 2
[3]

This question is about ionic and covalent compounds. Complete the word equation to show the reaction between magnesium carbonate and nitric acid.

Answer:

Knowledge points:

Solution:

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