Question

20mL of 6%(W/V) urea solution is diluted with water such that final volume of solution is 1L.The molarity of final solution is?

Answer 1

6%  (W/V) solution of urea means 6 gram urea in 100 ml of solution

So, 6/60 = 1/10 = 0.1 mole of urea in 100 ml of solution.

So, Molarity = 0.1/0.1 = 1 M

Now, by using M₁V₁ = M₂ V₂

              1* 20 = M₂ * 1000

           M₂ = 0.02 M