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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 co... 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
To determine which compound will not neutralise dilute hydrochloric acid, we assess the properties of the given compounds:
- Copper Carbonate (A): This compound reacts with hydrochloric acid to produce carbon dioxide and copper chloride.
- Copper Hydroxide (B): This will react with hydrochloric acid to form water and copper chloride.
- Copper Oxide (C): Similar to the above, it will react to produce copper chloride.
- Copper Sulfate (D): This compound does not react with hydrochloric acid to produce copper chloride.
Thus, the correct answer is D copper sulfate.
Step 2
Use words from the box to complete the word equation for the reaction of magnesium carbonate to produce magnesium chloride.
Answer
The word equation can be completed as follows:
magnesium + hydrochloric acid + magnesium carbonate → magnesium chloride + carbon dioxide + water.
Using the word 'hydrochloric acid' from the box fulfills the requirement.
Step 3
Explain which tablet, A or B, is the best value for money.
Answer
To determine the best value for money, we need to calculate the cost per cm³ of hydrochloric acid neutralised by each tablet.
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For tablet A:
- Cost: £2.5
- Volume neutralised: 30.6 cm³
- Cost per cm³ = £2.5 / 30.6 cm³ = £0.0817 per cm³
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For tablet B:
- Cost: £1.2
- Volume neutralised: 10.2 cm³
- Cost per cm³ = £1.2 / 10.2 cm³ = £0.1176 per cm³
Comparing the two, tablet A offers a better value for money as it neutralises more volume of acid for a lower cost per cm³.
Step 4
Step 5
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 for several reasons:
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Toxicity: Chlorine is a highly toxic gas that can cause severe health issues if inhaled. Exposure can lead to respiratory problems, eye irritation, and skin burns.
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Environmental Risks: If chlorine were to leak, it could have devastating effects on nearby wildlife and the environment.
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Flammability: Chlorine is reactive and can pose a risk of fire or explosion when in contact with organic substances.
Due to these factors, proper safety measures and regulations are essential when producing chlorine.