Making soluble salts (Edexcel GCSE Chemistry Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Why must acid be heated in a fume cupboard when making salts by Method 1?
Why must acid be heated in a fume cupboard when making salts by Method 1?
To avoid inhaling acid fumes
Why is the insoluble base added until it is in excess?
Why is the insoluble base added until it is in excess?
To ensure all acid has been neutralised
What equipment is used to filter out the excess base?
What equipment is used to filter out the excess base?
Filter paper and funnel
How are salt crystals dried after filtering?
How are salt crystals dried after filtering?
In a warm oven or by air drying
How do you know when the base is in excess?
How do you know when the base is in excess?
No more base reacts & excess sinks
What is the purpose of heating the salt solution with a Bunsen burner?
What is the purpose of heating the salt solution with a Bunsen burner?
To evaporate some of the water
Why can't excess alkali be used in Method 2?
Why can't excess alkali be used in Method 2?
Both alkali & salt are soluble
What equipment is used to measure a set volume of acid?
What equipment is used to measure a set volume of acid?
Pipette
What equipment is used to add alkali slowly during titration?
What equipment is used to add alkali slowly during titration?
Burette
What is the 'end point' in a titration?
What is the 'end point' in a titration?
When indicator changes colour
Why must the titration be repeated without indicator?
Why must the titration be repeated without indicator?
To avoid contaminating the salt
Why should universal indicator not be used for titrations?
Why should universal indicator not be used for titrations?
The colour change is too gradual