How many kilograms of water must evaporate from 8kg of a 25% salt solution to produce 40% salt solution?

The kilograms of water must evaporate from 8kg of a 25% salt solution to produce 40% salt solution is 3 kg.

Explanation:

According to the ratio and proportion:

where,

= concentration of ist solution = 25%

= mass of ist solution = 8 kg

= concentration of second solution = 40%

= mass of second solution = ? kg

Thus the final solution must have a mass of 5 kg , i.e (8-5)= 3 kg of mass must be evaporated.

Therefore, the mass that must be evaporated from 8kg of a 25% salt solution to produce 40% salt solution is 3 kg.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current