Happs_2705
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#1
Report Thread starter 1 year ago
#1
Hi, I am doing this question and I’m very confused.

Hydrated copper sulfate, CuSO4.5H2O, is a blue solid. Anhydrous copper sulfate, CuSO4, is a white solid. Heat energy is needed to convert hydrated copper sulfate to anhydrous copper sulfate. This is a reversible reaction.
Devise an experiment to show that this is a reversible reaction.
(4)

This is what I’ve written: firstly we will use a Bunsen burner to heat a bowl hydrated copper sulfate crystals. Water will then be evaporated and we will see steam being produced and this will leave us with anhydrous copper sulfate. We will then turn of the Bunsen burner and add water to the bowl using a pipettes so that the water can react with the anhydrous solid and lastly, heat will be released and we are left with copper sulfate crystals in the bowl again. But the mark scheme says something different. I have attached the mark scheme, could you please give me a mark and tell me how I should tweak my answer to get 4 marks. Help would be very appreciated. Thanks
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Happs_2705
Badges: 11
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#2
Report Thread starter 1 year ago
#2
Here is the mark scheme. I am mostly confused as the ms says that water is produced but I say it’s evaporated and steam is produced. Thanks.
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