Molten zinc chloride is electrolysed using inert electrodes.
.1
Explain why the zinc chloride must be molten.
[2 marks].2
Name the product at the cathode.
[1 mark].3
Name the product at the anode.
[1 mark]AQA GCSE Chemistry November 2020 Paper 1F
5 questions on this paper's topics
18:001 of 5
Chemical reactions can transfer energy to or from the surroundings.
.1
Which two reactions are exothermic? Tick two boxes.
[2 marks].2
Give one everyday use of an endothermic reaction.
[1 mark]Acids react with metals, bases and carbonates to make salts.
.1
Name the salt made when magnesium oxide reacts with hydrochloric acid.
[1 mark].2
Name the salt made when sodium hydroxide reacts with sulfuric acid.
[1 mark].3
Name the gas produced when calcium carbonate reacts with hydrochloric acid.
[1 mark]A teacher adds a small piece of lithium to a trough of water containing universal indicator.
.1
Give two observations the students would see.
[2 marks].2
Complete the word equation: lithium + water → lithium hydroxide + ______
[1 mark].3
The teacher repeats the demonstration with potassium. Predict how the reaction compares.
[1 mark]A student adds small pieces of four metals to dilute hydrochloric acid and to water.
| Metal | With dilute acid | With water |
|---|---|---|
| A | Vigorous fizzing | Slow bubbles |
| B | Slow bubbles | No reaction |
| C | No reaction | No reaction |
| D | Too dangerous to try | Vigorous fizzing, melts |
.1
Use the results to put the metals in order of reactivity, most reactive first.
[1 mark].2
Which metal could be copper?
[1 mark].3
Complete the word equation: magnesium + hydrochloric acid → magnesium chloride + ______
[1 mark]