Gce Model Questions Vol1 2024 Chemistry Question 4

Practice essay / theory question 4 from the 2024 Gce Model Questions Vol1 Chemistry examination. This question covers mole concept, empirical formula, percent composition, stoichiometry, solution concentration .

Gce Model Questions Vol1 2024 Chemistry Essay / Theory
Topics: mole concept empirical formula percent composition stoichiometry solution concentration
Question 4 GCE_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • essay
Gce Model Questions Vol1 2024 Chemistry Question 4 diagram

The diagram shows the structural formula of copper(II) sulfate pentahydrate, CuSO4·5H2O. The compound consists of a Cu²⁺ ion coordinated to a tetrahedral sulfate (SO4) group and five water molecules attached to the copper ion.

Question Parts

( a )
Write the empirical formula of the compound shown and state the total number of atoms present in one formula unit.
( b )
Calculate the mass percent of water in the hydrate.
( c )
A 12.5 g sample of the hydrate is heated until it becomes completely anhydrous. Determine (i) the mass of anhydrous CuSO4 obtained and (ii) the mass of water lost.
( d )
The anhydrous CuSO4 obtained is dissolved in water to prepare 250 cm³ of a solution that contains exactly 0.200 mol of CuSO4. Calculate (i) the concentration of the solution in g L⁻¹ and (ii) the approximate volume of water (in cm³) required, assuming the density of water is 1.00 g cm⁻³ and the volume contributed by the solute is negligible.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Gce Model Questions Vol1 2024 Chemistry Question 4. It is one of the essay questions from the 2024 Gce Model Questions Vol1 Chemistry examination.

The question covers mole concept, empirical formula, percent composition, stoichiometry, solution concentration .

View More Gce Model Questions Vol1 2024 Chemistry Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support