Question

A 5% solution means that : a) 5 g. Sugar is dissolved in 95 g. of water. b) 5 g. Sugar is dissolved in 100 g. Of water.

Answer 1

Answer:

b)

Explanation:

5% solution means concentration of solution.

Concentration of solution=( volume of the solute / volume of the solvent)×100

If we choose a) ... then,

(5/95)×100 ≠5%

But,

(5/100)×100= 5%

Hence, proved as well

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Answer 2

Answer:

5g of sugar is (solute)

95g of water is (solvent)

so,

concentration of solution =

Mass of solution

______________ *100

Mass of solution

= 5

___ *100

95

Now,

Mass of solution =mass of solute + mass of solvent

= 5+95

100

Now, by putting the values of 'mass of solute ' and 'mass of solution 'in the above formula, we get

Concentration of solution =

5

____*100

100

=5%

So, the answer will be 'a '

Not 'b'

Explanation: