Required Practical 10b (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the purpose of adding anti-bumping granules to the reaction mixture during reflux?
What is the purpose of adding anti-bumping granules to the reaction mixture during reflux?
To create small bubbles preventing sudden boiling
In which direction should water flow through the reflux condenser?
In which direction should water flow through the reflux condenser?
From bottom inlet to top outlet
Why should the top of the reflux condenser not be sealed?
Why should the top of the reflux condenser not be sealed?
To prevent pressure buildup
What volume of sodium hydrogencarbonate solution is used to wash the organic product?
What volume of sodium hydrogencarbonate solution is used to wash the organic product?
25 cm³
Which layer is discarded when using a separating funnel during the washing stage?
Which layer is discarded when using a separating funnel during the washing stage?
The aqueous (bottom) layer
What indicates that all water has been absorbed by the drying agent?
What indicates that all water has been absorbed by the drying agent?
The liquid becomes clear
What is characteristic of the boiling point range of a pure organic liquid?
What is characteristic of the boiling point range of a pure organic liquid?
It boils within a narrow range
Where should the thermometer be positioned during distillation to measure vapour temperature?
Where should the thermometer be positioned during distillation to measure vapour temperature?
Just above the boiling liquid
Why must pressure be released periodically when washing with sodium hydrogencarbonate solution?
Why must pressure be released periodically when washing with sodium hydrogencarbonate solution?
Due to CO₂ gas formation
How many spatulas of anhydrous drying agent are added to the organic layer?
How many spatulas of anhydrous drying agent are added to the organic layer?
3 spatulas