A teacher shows a class how some metals react with cold water and with dilute hydrochloric acid.
The table shows the observations.
| Metal | Reaction with cold water | Reaction with dilute hydrochloric acid |
|---|---|---|
| copper | no reaction | no reaction |
| magnesium | a few bubbles very slowly | fast fizzing |
| potassium | violent reaction, lilac flame | not tested |
| zinc | no reaction | steady bubbling |
Use the information in the table to put the four metals in order of reactivity. Start with the most reactive.
Give a reason why potassium was not added to dilute hydrochloric acid.
Name the gas produced when magnesium reacts with dilute hydrochloric acid.
Name one metal that is less reactive than copper.
Sodium reacts with cold water. Complete the word equation for this reaction by naming both products: sodium + water →\rightarrow→ ________ + ________
45 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.