Chemical Analysis - exam practice
Chemical Analysis
Question 1 of 8
A student is identifying metal ions through flame tests.
Describe how to complete a flame test.
What colour flame is produced when a sample containing copper ions undergoes a flame test?
What colour flame is produced when a sample containing sodium ions undergoes a flame test?
A student wishes to identify the metal in a metal chloride solid sample.
She thinks the metal could be sodium, potassium, calcium or aluminium.
Describe the tests that can be performed to indicate the presence of each of these metal ions.
This question is about tests that are carried out on ionic substances to identify the ions present.
Hydrochloric acid is added to the solid being tested.
Carbon dioxide is given off.
State what must be present in the substance.
Describe the test for chloride ions and state the colour of the precipitate formed.
The student tests for iodide ions by adding dilute nitric acid, followed by silver nitrate solution.
State the colour of the precipitate formed if iodide ions are present.
Hydrochloric acid is added to the solid, followed by barium chloride solution.
A white precipitate forms.
State what ion must be present in the solid.
A student wants to identify the gases present in three test tubes, A, B and C.
Describe how the student could test to see if any of the gases is carbon dioxide.
The student places a lighted splint in test tube A, which contains a colourless gas.
A pop sound is heard.
State the name of the gas in test tube A.
Describe the test for chlorine gas.
A student is completing qualitative tests on some unknown substances.
The student predicts the substances contain halide ions.
Describe how to test for halides.
The table below shows the results of the tests.
State which sample does not contain halide ions.
State the name of the halide ions found in the other samples.
Write the balanced chemical reaction for the reaction between sodium chloride and silver nitrate (AgNO3).
This question is about the reaction between copper carbonate and sulfuric acid.
Write a balanced chemical equation for the reaction between copper carbonate and sulfuric acid.
Describe a test the student could do to identify the gas produced.
Describe how the student would know when the chemical reaction has stopped.
This question is about the qualitative analysis of substances.
Match the description of each test to the substance it is testing for.
A student adds a small piece of sodium metal to a trough of water.
Write a balanced symbol equation for the reaction between sodium and water.
The student captures the gas produced by holding a test tube above the sodium as it moves around on the water surface.
Describe a test the student can complete to confirm that the gas produced is hydrogen gas.
Some ionic compounds contain potassium ions.
Metal ions can be identified through flame tests.
State the colour of the flame produced when the substance contains potassium ions.
This question is about qualitative tests on unknown substances.
A student has an unknown compound.
She adds dilute hydrochloric acid and then barium chloride.
A white precipitate forms.
Which of the following is present in the substance?
The student conducts a flame test for metal ions.
Which of the following is correct?
Describe a simple test for chlorine gas.