A student performed an experiment to determine the ratio of H2O to CuSO4 in a sample of hydrated cop — Laboratory Chemistry Chemistry Question
Question
A student performed an experiment to determine the ratio of H2O to CuSO4 in a sample of hydrated copper(II) sulfate by heating it to drive off the water and weighing the solid before and after heating. The formula obtained experimentally was CuSO4 •5.5H2O but the accepted formula is CuSO4 •5H2O. Which error best accounts for the difference in results?
A.✓ Correct
During heating some of the hydrated copper(II) sulfate was lost.
B.
The hydrated sample was not heated long enough to drive off all the water.
C.
The student weighed out too much sample initially.
D.
The student used a balance that gave weights that were consistently too high by 0.10 g.
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