why do we generally use 5% of salt to prepare 5% of solution in an experiment conducted to verify law of conservation of mass?

why do we generally use 5% of salt to prepare 5% of solution in an exp

1.	why do we generally use 5% of salt to prepare 5% of solution in an experiment conducted to verify law of conservation of mass?
Answer» Accrording to law of CONSERVATION of MASS , mass of reactants should be EQUAL to mass of products. To equal the mass of solution andwater , we NEED to take 5% of salt to prepare 5% of solution.