Question

250g of salt solution on complete evaporation gives back 30g of salt . Calculate concentration of salt solution in terms of mass by mass %.

Answer 1

Answer:

The mass by mass% is 10.7%

Explanation:

After evaporation the residue of salt is 30g.

This means that the mass of solute is 30g

Mass of the solution is 250g

We know, mass by mass% = mass of solute by mass of solution *100

                =     30g /250 +30*100 = 30/280*100 = 10.7%

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