Question

A solution contains 60 g of sugar dissolved in 740 g of water. Calculate the change in concentration of this solution by mass percentage method when 200 g more water is mixed.
(1) Concentration will increase by 1.5%
(2) Concentration will decrease by 1.5% (3) Concentration will decrease by 3.5% (4) No change in concentration​

Answer 1

Answer:

concentration will decrease by 1.5%

Explanation:

Initially :

mass of solute = 60 g

mass of solutions = 60g + 740 g

= 800 g

mass percentage = (60 / 800)* 100

=. 7.5%

when 200 g of water is added then :

mass of solution = (800 + 200)g

=. 1000 g

mass percentage= (60 /1000)*100

= 6%

change in concentration = 7.5% - 6%

= 1.5%

concentration will decrease by 1.5%

Answer 2

Answer:

option 2 is the correct answer.