Question

three students A,B and C wanted to prepare 60 percent (w/v) solution of sodium chloride. A dissolved 60 gm of water , b dissolved 60gm of the salt in 100 gm of water and c dissolved gm of salt in water and made the volume of the solution to in 100 ml which of them made desired solution .justify by calculating the stregth of each​

Answer 1

Answer:

c is your answer

Explanation:

C' has made the desired solution

Mass by volume %=  

Volume of solution

Mass of solute

​  

×100

=  

100

50

​  

×100

=50% mass by volume

50 % Mass by volume means 50g of NaOH is dissolved in 100ml of solution. So C makes the solution. A has taken 100 ml of water itself. Hence, A does not make the desired solution. B has taken 100 gm of water. Thus, for B also, the solution will not be 50% mass by volume.