Answer to Question #202816 in Chemistry for Kaushalya

Question

1.   How many grams of Copper Sulphate Pentahydrate (CuSO₄.5H₂O) are needed to prepare a 500 ml of 4% CuSO₄ solution?

Answer 1

w = (100 x m_sollute ) / m_{solute+solvent}

Lets assume that solution density is 1 mg/l. Therefore m_(solution) = V = 500 g.

4 = 100 x m_solute / 500

m_solute = (500 x 4)/100 = 20 g