Question

In the laboratory you are asked to make a 0.561 m copper(II) sulfate solution using 475 grams of water.

How many grams of copper(II) sulfate should you add?
grams.

Answer 1

Moleculer weight of Cu(II) sulphate is 159.609 g/mol

1 m copper(II) sulfate solution contains 159.609 g CuSO₄

So 0.561 m copper(II) sulfate solution contains (0.561* 159.609) = 89.54 g CuSO4

If we think about 0.561 m solution then

1000 g water contains 89.54 g CuSO4

1g water contains (89.54/1000) g CuSO4

475 g water contains (89.54* 475)/1000 = 42.53 g CuSO4

So , to prepare 0.561 m Cu(II) sulphate solution using 475 g of water 42.53 g Cu(II) sulphate is needed.