A student is preparing to safely clean up a small spill of pure liquid bromine in a fume cupboard by reacting it with dilute aqueous sodium thiosulfate.
Which row of the table shows the correct state symbols for the two reactants in this reaction, and the correct hazard classification for bromine?
| Row | Pure liquid bromine | Dilute aqueous sodium thiosulfate | Hazard of bromine |
|---|---|---|---|
| A | (aq)(aq)(aq) | (aq)(aq)(aq) | Corrosive and toxic |
| B | (l)(l)(l) | (aq)(aq)(aq) | Corrosive and toxic |
| C | (l)(l)(l) | (l)(l)(l) | Flammable |
| D | (g)(g)(g) | (aq)(aq)(aq) | Flammable |
Row A
Row B
Row C
Row D
230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.