Using your knowledge of the reactivity series and chemical reactions:
Lead can be extracted from lead(II) oxide, PbO\text{PbO}PbO, by heating it with carbon. Explain why carbon can be used to extract lead from its oxide, referring to their relative reactivity.
Magnesium reacts with dilute hydrochloric acid, HCl\text{HCl}HCl, to produce magnesium chloride, MgCl2\text{MgCl}_2MgCl2, and hydrogen gas, H2\text{H}_2H2.
Write the balanced symbol equation for this reaction.
A student reacts a sample of magnesium with excess dilute hydrochloric acid and obtains 5.8 g5.8\text{ g}5.8 g of magnesium chloride.
They calculated that their theoretical (predicted) yield should have been 8.2 g8.2\text{ g}8.2 g of magnesium chloride.
Calculate the percentage yield of magnesium chloride. Give your answer to 1 decimal place.
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.