Question

30 litre solution contain 20% of salt how much salt has been added in solution to make salt 25% in solution

Answer 1

Answer:

salt in solution is 8 litre

Explanation:

let the quantity of water added be x.

quantity of salt in water=30*20/100=6

30 litre solution contain 20% of salt= quantity of water/total salt+water quantity=left over salt solution =100-25

6/(30-x)*100=75

6/(30-x)=3/4

24=3(30-x)

90-3x=24

3x=66

x=22ltrs

salt in solution =30-22=8 litre

Hence salt in solution is 8 litre

Answer 2

Salt  which has been added in solution to make salt 25% in solution will be 8 litres

Explanation:

• A mole is defined as a unit of measurement that measures the amount of any fundamental entity like atoms, molecules, or ions present in the substance.
• It is similar to the concept of weight as a mole, it also helps in a better understanding of the amount of a substance present.
• Mole fraction is usually represented by the number of molecules of a particular component that is present in a mixture and is divided by the total number of moles in the given mixture.

Now Let the quantity of water which is added be x.

The quantity of salt which is present in water=30×$\frac{20}{100}$=6

30 litre solution contain 20% of salt= quantity of water/total salt+water quantity=left over salt solution =100-25

6/(30-x)×100=75

6/(30-x)=3/4

24=3(30-x)

90-3x=24

3x=66

x=22ltrs

Salt  present in solution =30-22=8 litre

Hence salt in solution is 8 litre

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