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3. (a) Dilute hydrochloric acid can be used to make salts - Edexcel - GCSE Chemistry - Question 3 - 2012 - Paper 1
Question 3
3. (a) Dilute hydrochloric acid can be used to make salts. The salts produced are chlorides. Some copper compounds react with dilute hydrochloric acid to produce cop... show full transcript
Worked Solution & Example Answer:3. (a) Dilute hydrochloric acid can be used to make salts - Edexcel - GCSE Chemistry - Question 3 - 2012 - Paper 1
Step 1
Which of the following compounds will not neutralise dilute hydrochloric acid to produce copper chloride?
Answer
The compound that will not neutralise dilute hydrochloric acid to produce copper chloride is A: copper carbonate. This is because copper carbonate does not react with hydrochloric acid to form the corresponding chloride, but instead could form copper chloride and carbon dioxide.
Step 2
Step 3
Explain which tablet, A or B, is the best value for money.
Answer
To determine the best value for money, we can calculate the cost per cm³ of hydrochloric acid neutralised for each tablet.
For tablet A:
- Cost: £2.50
- Volume neutralised: 30.6 cm³
- Cost per cm³ = £2.50 / 30.6 cm³ = £0.0817 per cm³.
For tablet B:
- Cost: £1.20
- Volume neutralised: 10.2 cm³
- Cost per cm³ = £1.20 / 10.2 cm³ = £0.1176 per cm³.
Thus, tablet A is the best value for money because it neutralises more acid for a lower cost per cm³.
Step 4
Step 6
Explain why it could be dangerous to produce large amounts of chlorine in a factory.
Answer
Producing large amounts of chlorine can be dangerous because chlorine is toxic and can leak out, leading to harmful effects on people and the environment. It can cause irritation to the respiratory system and eyes, and exposure can lead to severe health risks or even death.