When solid ammonium chloride is shaken with water, a colourless solution forms and the temperature changes from 20°C to 16°C - Edexcel - GCSE Chemistry - Question 6 - 2016 - Paper 1
Question 6
When solid ammonium chloride is shaken with water, a colourless solution forms and the temperature changes from 20°C to 16°C.
Give the name of the type of heat chan... show full transcript
Worked Solution & Example Answer:When solid ammonium chloride is shaken with water, a colourless solution forms and the temperature changes from 20°C to 16°C - Edexcel - GCSE Chemistry - Question 6 - 2016 - Paper 1
Step 1
Give the name of the type of heat change occurring.
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Answer
The type of heat change occurring is called an endothermic reaction. This occurs because the dissolution of ammonium chloride in water absorbs heat from the surroundings, resulting in a decrease in temperature.
Step 2
State a suitable container for the iron(II) sulfate solution in this experiment.
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Answer
A suitable container for the iron(II) sulfate solution would be a clean beaker or a test tube. Both allow for easy observation of the solution and can be safely used to heat or mix the solutions.
Step 3
State what the student should do to the mixtures during the experiment.
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Answer
The student should stir the mixtures during the experiment to ensure that the added metals are fully immersed in the iron(II) sulfate solution, allowing for a more accurate measurement of the temperature changes.
