Question

What is the concentration of a mass of `125*g` of copper sulfate dissolved in a `1*L` volume of water?

Answer 1

`[CuSO_4]=0.783*mol*L^-1`

Explanation:

We work out the quotient....

`"concentration"....="moles of solute"/"volume of solution"`

And thus `[CuSO_4]=((125*g)/(159.61*g*mol^-1))/(1.0*L)=0.783*mol*L^-1`.

This is a beautiful reaction to do in that the copper species in aqueous solution, `[Cu(OH_2)_6]^(2+)` has a beautiful blue colour, whereas the anhydrous salt is white....

From aqueous solution, very large macroscopic crystals can be obtained. The crystals correspond to the penta-aqua complex `[Cu{(OH)_2}_5]SO_4*H_2O`.