Answer to Question #152362 in General Chemistry for Lion king

Question

Find the mass of Na2SO4∙10H2O that is needed to make 400 ml of sodium sulfate solution with the molar concentration of 0.03 mol/L.

Answer 1

Cm=n/V.

n=Cm x V = 0.03 x 0.4 = 0,012 moles.

0.012 x 142 = 1,704 g of Na2SO4.

1.704 x 322/ 142 = 3,864 g of Na2SO4∙10H2O.