Required Practical: Investigating Temperature Changes (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes

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Required Practical: Investigating Temperature Changes
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What volume of hydrochloric acid is used in this experiment?

25 cm325 \text{ cm}^3

What temperature should the hydrochloric acid be heated to before adding it to the cup?

25°C25°\text{C}

What mass of powdered magnesium is added to the cup?

1 g

Why is a polystyrene cup used in this experiment?

To minimise heat loss

How often should the temperature be recorded during the experiment?

Every 30 seconds

For how long should the temperature be monitored in total?

5 minutes

By how much should the acid concentration be increased each time the experiment is repeated?

0.2 g/dm30.2 \text{ g/dm}^3

What is the starting concentration of hydrochloric acid in this experiment?

0.2 g/dm30.2 \text{ g/dm}^3

What is the maximum concentration of hydrochloric acid used in this experiment?

1.0 g/dm31.0 \text{ g/dm}^3

If the temperature increases during the reaction, what type of reaction is it?

Exothermic

What happens in an endothermic reaction?

Temperature decreases, absorbs energy

What is placed inside the beaker with the polystyrene cup to provide further insulation?

Cotton wool

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Exothermic & Endothermic Reactions

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Exothermic & Endothermic Reactions

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Exothermic & Endothermic Reactions

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Exothermic & Endothermic Reactions

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