Neco Model Questions Vol1 2025 Chemistry Question 5

Practice essay / theory question 5 from the 2025 Neco Model Questions Vol1 Chemistry examination. This question covers Stoichiometry, Gases .

Neco Model Questions Vol1 2025 Chemistry Essay / Theory

Topics: Stoichiometry Gases

Question 5 NECO_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • essay

A 12.0 g sample of calcium carbonate is heated strongly in a closed container of volume 2.00 L. The decomposition reaction is CaCO₃(s) → CaO(s) + CO₂(g). After heating, the temperature of the system is 500 °C and the pressure inside the container is 1.00 atm. The volume of carbon dioxide actually collected is 1.85 L.

Question Parts

( a )

Calculate the number of moles of CaCO₃ that decompose.

( b )

Using the ideal gas law, determine the theoretical volume of CO₂ (in litres) that would be produced at 500 °C and 1.00 atm.

( c )

Calculate the percent yield of CO₂ based on the actual volume collected (1.85 L).

( d )

Briefly explain two possible reasons why the decomposition of CaCO₃ did not go to completion under the given conditions.

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 Neco Model Questions Vol1 2025 Chemistry Question 5. It is one of the essay questions from the 2025 Neco Model Questions Vol1 Chemistry examination.

The question covers Stoichiometry, Gases .

View More Neco Model Questions Vol1 2025 Chemistry Questions More Neco 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