Required Practical: Preparation of a Soluble Salt (AQA GCSE Chemistry Combined Science): 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 copper(II) chloride produced in this experiment?
What type of salt is copper(II) chloride produced in this experiment?
Soluble salt
Which acid is reacted with copper(II) oxide to make the salt?
Which acid is reacted with copper(II) oxide to make the salt?
Hydrochloric acid
What type of substance is copper(II) oxide in this reaction?
What type of substance is copper(II) oxide in this reaction?
An insoluble metal base
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 to stop adding copper(II) oxide?
How do you know when to stop adding copper(II) oxide?
Excess remains undissolved
What is the purpose of the first filtration step?
What is the purpose of the first filtration step?
Remove unreacted excess
What happens during the evaporation step in a water bath?
What happens during the evaporation step in a water bath?
Water evaporates, concentrating
What is crystallisation?
What is crystallisation?
Pure crystals forming as solution cools
What should you do after heating to allow crystals to form?
What should you do after heating to allow crystals to form?
Allow the solution to cool slowly
What is the balanced equation for this reaction?
What is the balanced equation for this reaction?
Why is excess copper(II) oxide used in this method?
Why is excess copper(II) oxide used in this method?
To neutralise all the acid
What happens to insoluble salts in water?
What happens to insoluble salts in water?
They precipitate and settle at bottom