Identification of ions by chemical and spectroscopic means (chemistry only)

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Question 16
Medium

Lithium tetrachloroaluminate is a chemical compound.

The formula of lithium tetrachloroaluminate is LiAlCl4\text{LiAlCl}_4LiAlCl4​.

a.

Give a test to identify the Group 1 metal ion in lithium tetrachloroaluminate. You should include the result of the test.

[2]
b.

Name one instrumental method that could identify the Group 1 metal ion and show the concentration of the ion in a solution of lithium tetrachloroaluminate.

[1]
c.

A student identifies the other metal ion in lithium tetrachloroaluminate. The student tests a solution of lithium tetrachloroaluminate by adding sodium hydroxide solution until a change is seen. Give the result of this test.

[1]
d.

This test gives the same result for several metal ions. What additional step is needed so that the other metal ion in lithium tetrachloroaluminate can be identified? Give the result of this additional step.

[2]
e.

Describe a test to identify the presence of chloride ions in a solution of lithium tetrachloroaluminate. Give the result of the test.

[3]

Identification of ions by chemical and spectroscopic means (chemistry only) Questions

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  3. /Identification of ions by chemical and spectroscopic means (chemistry only)