posted by Elaine .
Calculate the density of 150g of a 25% by wieght solution of sodium chloride dissolved in water and the volume of solution is 145ml.
25% means 25 g NaCl/100 g soln so if we have 150 g of the soln we have
25g NaCl x (150/100) = 37.5 g NaCl in 150 g soln. Since the volume is 145, then d = m/v = 37.5/145 mL = ? g/mL.