Question

Describe how a chemist should set up his or her stoichiometric calculation to predict the mass of CuSO4 that forms when a specified mass of CuSO4•5H2O is heated.

Answer 1

Convert mass of CuSO4•5H2O to moles using molar mass of CuSO4•5H2O.

Convert moles of CuSO4•5H2O to moles of CuSO4 using a mole ratio.

Convert moles of CuSO4 to mass of CuSO4 using molar mass of CuSO4.

Answer 2

1) Calculate the number of moles of Cu SO4 . 5H20 by dividing the specified mass by the molar mass.

2) The ratio of production given by the equation is 1 mol of Cu SO4 . 5 H2O to 1 mol of Cu SO4=> 1:1, meaning that the number of moles of Cu SO4 produced is the same number of moles of Cu SO4.5H20 heated.

3) Finally mutiply the number of moles of Cu SO4 by its molar mass and there you have the mass of Cu SO4 produced.