This question is about salts - AQA - GCSE Chemistry - Question 5 - 2021 - Paper 1
Question 5
This question is about salts.
Name the salt produced by the neutralisation of hydrochloric acid with potassium hydroxide.
Write an ionic equation for the neutralis... show full transcript
Worked Solution & Example Answer:This question is about salts - AQA - GCSE Chemistry - Question 5 - 2021 - Paper 1
Step 1
Name the salt produced by the neutralisation of hydrochloric acid with potassium hydroxide.
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Answer
The salt produced is potassium chloride, represented as KCl.
Step 2
Write an ionic equation for the neutralisation of hydrochloric acid with potassium hydroxide.
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Answer
H++OH−→H2O
Step 3
Which of these insoluble solids can be used to make a copper salt by reacting the solid with dilute hydrochloric acid?
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Answer
Copper carbonate and copper oxide only.
Step 4
Give one reason for: step 2
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Answer
Heating the sulfuric acid speeds up the reaction between sulfuric acid and magnesium oxide.
Step 5
Give one reason for: step 5
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Answer
Step 5 ensures all the hydrochloric acid has reacted with magnesium oxide.
Step 6
Give one reason for: step 6
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Answer
Filtering removes excess magnesium oxide from the solution.
Step 7
How should the filtrate be evaporated gently in step 7?
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Answer
The filtrate should be evaporated using a boiling water bath or an electric heater.
Step 8
Calculate the number of moles of iron used
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Answer
(moles Fe = \frac{14}{56} = 0.25 \text{ mol})
Step 9
Calculate the number of moles of chlorine that react with 14 g of iron
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