Neco Model Questions Vol1 2022 Chemistry Question 5

Practice essay / theory question 5 from the 2022 Neco Model Questions Vol1 Chemistry examination. This question covers Stoichiometry, Moles, Ideal gas law, Percent yield .

Neco Model Questions Vol1 2022 Chemistry Essay / Theory

Topics: Stoichiometry Moles Ideal gas law Percent yield

Question 5 NECO_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • essay

A sample of 12.0 g of calcium carbonate (CaCO₃) is mixed with excess hydrochloric acid (HCl) according to the reaction: CaCO₃ + 2 HCl → CaCl₂ + CO₂ + H₂O The carbon dioxide gas produced is collected over water at 25 °C and a total pressure of 760 mmHg. The volume of gas collected is 2.50 L. The vapour pressure of water at 25 °C is 23.8 mmHg.

Question Parts

( a )

Calculate the theoretical volume of CO₂ (in litres) that should be obtained at the given conditions if all of the CaCO₃ reacts completely.

( b )

Determine the percent yield of CO₂ based on the experimental volume collected.

( c )

If the experiment were repeated with 15.0 g of CaCO₃ but the same volume of CO₂ (2.50 L) was collected, discuss two plausible reasons for the lower percent yield, linking your discussion to concepts of reaction completeness and gas handling.

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 2022 Chemistry Question 5. It is one of the essay questions from the 2022 Neco Model Questions Vol1 Chemistry examination.

The question covers Stoichiometry, Moles, Ideal gas law, Percent yield .

View More Neco Model Questions Vol1 2022 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