Chemistry B (9-1) - Twenty First Century Science Suite J258 9-1: Chemical analysis Topical Past Paper Questions
OCR GCSE (9-1) Chemistry B (9-1) - Twenty First Century Science Suite J258 (9-1) past-paper questions on Chemical analysis, free. This topic is frequently examined across 6 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
(c) The scientist uses paper chromatography to separate the substances in one of their medicines. They use water as a solvent. The diagram shows their results. (i) Identify the stationary phase and the mobile phase in their experiment. Stationary phase ..... (ii) Use ideas about…
Ammonia is made on an industrial scale in a reaction between nitrogen and hydrogen. The equation to make ammonia is shown. $$ \mathrm{N}_{2}(\mathrm{g})+\mathrm{3H}_{2}(\mathrm{g})\rightleftharpoons2\mathrm{NH}_{3}(\mathrm{g}) $$ (a) What is the atom economy of this reaction? Exp…
Some brands of tablets that treat stomach upsets contain calcium carbonate, CaCO $ _{3} $. Jane does experiments to measure the mass of calcium carbonate in each tablet for two different brands of tablets. EasyCalm Pack size: 25 tablets FeelRight Pack size: 40 tablets (a) Jane wa…
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