Ijmb Model Questions Vol1 2025 Chemistry Question 4

Practice essay / theory question 4 from the 2025 Ijmb Model Questions Vol1 Chemistry examination. This question covers mole concept, stoichiometry, percent composition .

Ijmb Model Questions Vol1 2025 Chemistry Essay / Theory
Topics: mole concept stoichiometry percent composition
Question 4 IJMB_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • essay

The diagram shows the structural representation of copper(II) sulfate pentahydrate, CuSO4·5H2O. The copper ion (Cu²⁺) is surrounded by four water molecules in an octahedral coordination sphere and is ionically bonded to a sulfate ion (SO4²⁻). Five additional water molecules are present as water of crystallisation attached to the lattice. Using the information from the diagram, answer the following questions:

Question Parts

( a )
Calculate the number of moles present in a 2.00 g sample of CuSO4·5H2O.
( b )
From the sample in part (a), determine the number of moles of water of crystallisation that would be released on heating the hydrate to obtain anhydrous CuSO4.
( c )
Calculate the mass of anhydrous CuSO4 that remains after complete removal of the water of crystallisation from the sample in part (a).
( d )
Determine the mass percent of copper (Cu) in the original CuSO4·5H2O sample.

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About This Question

This is Ijmb Model Questions Vol1 2025 Chemistry Question 4. It is one of the essay questions from the 2025 Ijmb Model Questions Vol1 Chemistry examination.

The question covers mole concept, stoichiometry, percent composition .

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