Question

part a. Calculate the mass percent of a solution that is prepared by adding 69.3 g of NaOH to 493 g of H2O.

Express your answer numerically.

part b. Calculate the mass percent of a NaCl solution in which 146 g of NaCl is dissolved in 2.23 L of water at 25 ∘C (density = 0.997 g/mL). Express your answer numerically.

Answer 1

Solutions - Given data: - NaoH =69.39 HOO = 4939 Salute Solvent = NAOH = H2o of Edute Mass Mass %=-- (mass X100% of Blvent) of solute & mass 69. 39 6913+ 4939 X100% 69.3 562:3 $ .la32 X100% =18.326)

water, PART BB. Solute Mach dissdred Lader = Macl Solvent a mog = 2.83 L Hatol at = 25C density =0.997 g/ml volume of water = 2.23 X 1000 m 2230 ml density of water = (dersity of water) Volume of water] :- (0.997 g/ml) (2.230 mi) = 2.223319. Mass of wac! = 1469 Mass of.% = 1469 x 100 % rius +2.883319) 146 Kloo 148.da = 98.50% -798150%