Chlorine gas can be prepared in a laboratory by reacting concentrated hydrochloric acid with sodium chlorate(I) solution.
The table lists the chemical hazards associated with the substances involved in this reaction:
| Substance | Hazard symbols |
|---|---|
| Concentrated hydrochloric acid | Corrosive, Exclamation mark (Harmful) |
| Sodium chlorate(I) solution | Corrosive, Exclamation mark (Harmful), Hazardous to the environment |
| Chlorine gas | Toxic, Corrosive, Hazardous to the environment |
What are the hazards associated with sodium chlorate(I) solution?
flammable, toxic and hazardous to the environment
corrosive, harmful and hazardous to the environment
oxidising, flammable and corrosive
toxic, corrosive and flammable
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.