Exam code: 4XSD1
The diagram shows a test tube containing ammonium chloride that has been heated gently.
Which two gases are present at position Y?
Ammonia and hydrogen chloride
Ammonia and chlorine
Hydrogen and chlorine
Ammonia and hydrogen
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Hydrated copper sulfate is a blue salt that contains water molecules within its lattice structure.
When heated, the water is removed from the structure, forming white anhydrous copper sulfate.
Complete the word equation for the reaction.
hydrated copper sulfate ____________________ + ____________________
A student heated hydrated copper sulfate using the equipment in Figure 1.
Figure 1
What two observations would be made when hydrated copper sulfate was heated?
Tick (✓) two boxes.
Hydrated copper sulfate turns white |
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Hydrated copper sulfate turns blue |
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Substance A is a colourless liquid |
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Substance A is a white solid |
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Substance A is a blue solution |
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When hydrated copper sulfate is heated, an endothermic reaction occurs. What type of reaction occurs when water is added to anhydrous copper sulfate?
5.2 g of hydrated copper sulfate was heated in a test tube.
3.0 g of anhydrous copper sulfate remained after heating.
Calculate the mass of water that was given off in grams.
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