Required Practical: Investigating Temperature Changes (OCR GCSE Chemistry A (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 volume of hydrochloric acid is used in this experiment?
What volume of hydrochloric acid is used in this experiment?
25
What temperature should the hydrochloric acid be heated to before starting the reaction?
What temperature should the hydrochloric acid be heated to before starting the reaction?
25°C
What type of container is used to carry out the reaction?
What type of container is used to carry out the reaction?
Polystyrene cup
Why is a polystyrene cup used in this experiment?
Why is a polystyrene cup used in this experiment?
To minimize heat loss to surroundings
What mass of powdered magnesium is added to the acid?
What mass of powdered magnesium is added to the acid?
1 g
How often should the temperature be measured during the experiment?
How often should the temperature be measured during the experiment?
Every 30 seconds
For how long should temperature measurements be taken?
For how long should temperature measurements be taken?
5 minutes
By how much should the acid concentration be increased each time the experiment is repeated?
By how much should the acid concentration be increased each time the experiment is repeated?
0.2
What is the starting concentration of hydrochloric acid?
What is the starting concentration of hydrochloric acid?
0.2
If the temperature increases during a reaction, what type of reaction is it?
If the temperature increases during a reaction, what type of reaction is it?
Exothermic
What does an endothermic reaction do?
What does an endothermic reaction do?
Absorbs energy
What is the purpose of the cotton wool placed in the beaker around the cup?
What is the purpose of the cotton wool placed in the beaker around the cup?
To further insulate the reaction