Solutions - 2
•B.Calculations of solutions cont=d:
•2.Weight per unit volume (w/v)
•Make 1000 ml of a 0.85% NaCl aqueous solution
•0.85 gm  x   x gm
•100 ml       1000 ml
•100x   =   850
•x   =   8.5 gm
•so you would put 8.5 gm NaCl in flask and add H2O to 1000 mark.