Fig. 1 shows a student heating hydrated copper sulfate crystals in a dry test tube. The blue crystals become white as water is removed. The table below reco...
Question 1 Report
Fig. 1 shows a student heating hydrated copper sulfate crystals in a dry test tube. The blue crystals become white as water is removed. The table below records the masses during the investigation.
| measurement | mass / g |
|---|---|
| empty test tube | 18.60 |
| test tube + hydrated crystals | 21.10 |
| test tube + white solid after heating | 20.20 |
The white solid is anhydrous CuSO4. Mr of CuSO4 is 159.5 and Mr of water is 18.0. The hydrated compound has formula CuSO4·xH2O.
(a) Calculate the mass of water removed. [1]
(b) Calculate the amount, in mol, of anhydrous copper sulfate remaining. [2]
(c) Calculate the amount, in mol, of water removed. [1]
(d) Use your answers to give the value of x. [1]
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