Igcse Model Questions Vol1 2019 Chemistry Question 3

Practice practical question 3 from the 2019 Igcse Model Questions Vol1 Chemistry examination. This question covers Chemical Bonding, Conductivity of solutions, Solubility, Flame test .

Igcse Model Questions Vol1 2019 Chemistry Practical
Topics: Chemical Bonding Conductivity of solutions Solubility Flame test
Question 3 IGCSE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • practical

Three unknown solid samples labelled X, Y and Z have been supplied. Using appropriate laboratory techniques you are required to investigate the type of chemical bonding present in each sample.

Question Parts

( a )
Describe a suitable procedure for testing the electrical conductivity of aqueous solutions of the three samples. Include the apparatus required and the method of recording the observation.
( b )
Predict the observations you would expect for each sample in terms of (i) solubility in water, (ii) conductivity of the resulting solution and (iii) flame colour (if any). Present your answer in a table.
( c )
Using the predicted observations, deduce the most likely type of bonding (ionic, covalent or metallic) for each sample and justify your conclusion.
( d )
Identify two possible sources of error in the conductivity test and suggest how each could be minimised.

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About This Question

This is Igcse Model Questions Vol1 2019 Chemistry Question 3. It is one of the practical questions from the 2019 Igcse Model Questions Vol1 Chemistry examination.

The question covers Chemical Bonding, Conductivity of solutions, Solubility, Flame test .

View More Igcse Model Questions Vol1 2019 Chemistry Questions More Igcse Model Questions Vol1 Practice Questions Back to Questions

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