Question

Find the amount of sugar which is to be dissolved in water to get 25g of 20% w/w

aqueous solution.​

Answer 1

Answer:

5g sugar

Explanation:

20%(w/w) means 20g sugar in 100 g solution

total mass of solution is 25 g

mass of sugar =(20/100)×25

=5g

Answer 2

Explanation:

20%

Solubility is 25,so 25 gm in 100gm water

So In 200g of water 50 gm can be dissolved but 70gm is dissolved

So only 50gm dissolves and 20gm remains

Tot mass of final solution is 250gm

So conc of filtrate. Is 50/250*100 which is 20%