Required Practical: Preparation of a Soluble Salt (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What type of salt is produced in this practical?
What type of salt is produced in this practical?
Soluble salt
Which acid is used to prepare copper(II) chloride?
Which acid is used to prepare copper(II) chloride?
Hydrochloric acid
Which insoluble metal base is used in this practical?
Which insoluble metal base is used in this practical?
Copper(II) oxide
What is the soluble salt product of this reaction?
What is the soluble salt product of this reaction?
Copper(II) chloride
Why is the hydrochloric acid heated at the start?
Why is the hydrochloric acid heated at the start?
To increase the reaction rate
How do you know when all the acid has reacted?
How do you know when all the acid has reacted?
Excess CuO remains undissolved
Why is the solution filtered after adding copper(II) oxide?
Why is the solution filtered after adding copper(II) oxide?
To remove unreacted excess CuO
What happens during the evaporation step?
What happens during the evaporation step?
Water evaporates, concentrating the salt
When does crystallisation occur?
When does crystallisation occur?
As the solution cools slowly
Why is excess copper(II) oxide used?
Why is excess copper(II) oxide used?
To ensure all acid is neutralised
What happens to insoluble salts in water?
What happens to insoluble salts in water?
They precipitate out of solution
What are the products of the reaction ?
What are the products of the reaction ?
and