Question

It is desired to prepare 500g of 10% mass by mass percentage of urea in water. How much urea should be dissolved in how much volume of water? Density of water is 1g/ml.

Please answer this question! ​

Answer 1

Answer:

density of water is 1 g mL-1. a = 50g. = 450 / 1 = 450 ml. Hence the mass of urea required would be 50g and the volume of water required would be 450 ml.

hope it helps

Answer 2

Answer:

10% = wt of urea / wt of solution

10/100 = wt of urea / 500

50 g = wt of urea dissolved in water

solution - solute = solvent

therefore ,water used to make 500 g soln is

500- 50 = 450 g

450g = 450 ml ( density = 1 gm/ ml)