. You have a stock bottle of copper sulphate (heptahydrate). On the supplementary sheet supplied in the exam will be a mass concentration (%w/v) and volume of copper sulphate solution to be prepared.

If the relative molecular mass (M_r) of copper sulphate (heptahydrate) is 249.68, what is the molar concentration of the solution? Show your calculations and provide units.

Prepare 25ml of 10% w/v copper sulphate.