Igcse Model Questions Vol1 2022 Chemistry Question 3

Practice practical question 3 from the 2022 Igcse Model Questions Vol1 Chemistry examination. This question covers Chemical Bonding .

Igcse Model Questions Vol1 2022 Chemistry Practical
Topic: Chemical Bonding
Question 3 IGCSE_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • practical

A student is given three unknown solid samples, labelled X, Y and Z, and is required to investigate the type of chemical bonding present in each sample using simple laboratory tests.

Question Parts

( a )
Outline the complete procedure the student should follow to test each sample for (i) solubility in water, (ii) electrical conductivity of the resulting solution, and (iii) flame colour.
( b )
The following observations were recorded: • Sample X: soluble, solution conducts electricity, flame shows no colour. • Sample Y: insoluble, solution does not conduct, flame is orange‑red. • Sample Z: soluble, solution does not conduct, flame is bright green. Identify the most likely type of bond (ionic, covalent or metallic) in each sample and justify your answer.
( c )
For sample X, 0.500 g is dissolved in 250 mL of water and is known to dissociate completely into two ions. Calculate the molarity of each ion in the solution. (Molar mass of X = 58.44 g mol⁻¹)
( d )
Suggest one source of error that could affect the conductivity test and state how it can be minimised.

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About This Question

This is Igcse Model Questions Vol1 2022 Chemistry Question 3. It is one of the practical questions from the 2022 Igcse Model Questions Vol1 Chemistry examination.

The question covers Chemical Bonding .

View More Igcse Model Questions Vol1 2022 Chemistry Questions More Igcse Model Questions Vol1 Practice Questions Back to Questions

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