Igcse Model Questions Vol1 2018 Chemistry Question 25
Practice objective / multiple choice question 25 from the 2018 Igcse Model Questions Vol1 Chemistry examination.
Five grams of magnesium metal are placed in excess hydrochloric acid. The reaction \( \text{Mg} + 2\,\text{HCl} \rightarrow \text{MgCl}_2 + \text{H}_2 \) produces hydrogen gas, which is collected over water at 25 °C and 750 mmHg. The water vapour pressure at this temperature is 23.8 mmHg and the dry hydrogen volume measured is 0.850 L. Calculate the percentage yield of hydrogen based on the magnesium used.
Answer Options
About This Question
This is Igcse Model Questions Vol1 2018 Chemistry Question 25. It is one of the objective questions from the 2018 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.