To monitor the rate of a reaction, a student reacts excess magnesium ribbon with 0.18 moles0.18\text{ moles}0.18 moles of hydrochloric acid, HCl(aq)\text{HCl}(\text{aq})HCl(aq), and collects the hydrogen gas produced:
Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g) \text{Mg}(\text{s}) + 2\text{HCl}(\text{aq}) \rightarrow \text{MgCl}_2(\text{aq}) + \text{H}_2(\text{g}) Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)What is the theoretical volume of hydrogen gas collected at room temperature and pressure (rtp)?
(Take the molar volume of gas at rtp as 24 dm3/mol.)
4.32 dm34.32\text{ dm}^34.32 dm3
2.16 dm32.16\text{ dm}^32.16 dm3
2.02 dm32.02\text{ dm}^32.02 dm3
8.64 dm38.64\text{ dm}^38.64 dm3
91 exam-style questions on OCR GCSE Chemistry Monitoring chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.