Chemistry B (9-1) - Twenty First Century Science Suite J258 9-1: Making useful chemicals Topical Past Paper Questions
OCR GCSE (9-1) Chemistry B (9-1) - Twenty First Century Science Suite J258 (9-1) past-paper questions on Making useful chemicals, free. This topic is frequently examined across 6 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
(a) Ammonium sulfate, $ (NH_{4})_{2}SO_{4} $, is made in an industrial process for use as a fertiliser. Aqueous ammonium carbonate reacts with excess solid calcium sulfate. $$ \mathrm{(N H_{4})_{2}C O_{3}(a q)+C a S O_{4}(s)\rightarrow(N H_{4})_{2}S O_{4}(a q)+C a C O_{3}(s)} $$…
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…
The table shows the hydrogen ion concentration and the pH for different concentrations of two dilute acids. (a) Complete the information in the table. [2] [2] (b) Which acid in the table shows the highest concentration of hydrogen ions in solution? Tick (✓) one box. (d) (i) Compl…
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