Question

6. A solution made by dissolving 50 g of urea in 250 g of water. Calculate the concentration of this solution in mass percentage.

Answer 1

$\large{\bf{\gray{\underline{\underline{\orange{Given:}}}}}}$

Mass of solute = 50g

Mass of solvent = 250g

$\large{\bf{\gray{\underline{\underline{\green{To\:Find:}}}}}}$

We have to find conc. of this solution in mass percentage.

$\large{\bf{\gray{\underline{\underline{\pink{Solution:}}}}}}$

➳ Mass percentage is defined as the amount of solute in grams present in 100g of solution.

Formula :

$\dag\:\boxed{\bf{\red{\%\dfrac{w}{W}=\dfrac{Mass\:of\:solute}{Total\:mass\:of\:solution}\times 100}}}$

Let's calculate :D

$:\implies\sf\:\%\dfrac{w}{W}=\dfrac{50}{50+250}\times 100$

$:\implies\sf\:\%\dfrac{w}{W}=\dfrac{5000}{300}$

$:\implies\boxed{\bf{\%\dfrac{w}{W}=16.67\%}}$

Answer 2

Answer:

solute=50g

solvent=250g

amount of solute/ amount of solvent X 100

50/250x 100 =20