Question

A solution contain 20g of urea in 200g of water. Calculate the concentration of the solution

Answer 1

x = 20/220 M
this is concentration of solution

Answer 2

See here we have the following details


Mass of Solute: 20 g

Mass of Solution: 20 + 200 = 220 g

220 g solution includes 20 g solute

100 g solution includes X g solute

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

X= 9.09 g %

Or using formula;

Percent by mass= [mass of solute/mass of solution ] *100


= (20/220)*100
=100/11
=9.09