A student performed an experiment to determine the molecular...

A student performed an experiment to determine the molecular formula of a given sample of hydrated copper (II) sulphate by weighing the sample before and after heating. The formula obtained experimentally was

\mathrm{CuSO}_4 5.5 \mathrm{H}_2 \mathrm{O}

while the actual formula of the given sample is

\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}

. Which experimental error would account for the wrongly obtained result?

Options

ADuring heating, some of the hydrated copper(II) sulphate was lost
BThe hydrated sample was not heated long enough to remove all the water present
CWeight of the hydrated sample recorded was less than the actual weight taken
DThe balance used in the study showed all weights consistently high by 0.10 g

Correct answer

A. During heating, some of the hydrated copper(II) sulphate was lost

Step-by-step solution

No Solution

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