Question

Q2. A solution contains 2.5 gm of sugar in 50 gm of water. Calculate the concentration in terms of mass by mass percentage of the solution
​

Answer 1

Calculate the values using a calculator

Answer 2

Answer:

(i) Mass of sugar = 34.2 g

No. of moles of sugar =

Mol.mass

34.2

=

342

34.2

=0.1

Mass of water = (214.2-34.2)=180g=

1000

180

kg

No. of moles of water =

18

180

=10 mole

Molarity =

Mass of water in kg

No. of moles of sugar

=

180

0.1

×1000

=0.555M

Thus, the molarity of sugar is 0.555 M

(ii) Total number of moles =10.0+0.1=10.1

Mole fraction of sugar =

Total number of moles

No. of moles of sugar

=

10.1

0.1

=0.0099

Thus mole fraction of sugar syrup is 0.0099

Explanation:

Please make me as Brainliest