Question

All 204g of sugar will dissolve in 100g of water at 25ºC. This is the solubility of sugar. If 55g of sugar is dissolved in 50g of water at 25ºC then the solution is _______ compared to a solution that has 5g of sugar dissolved in 50g of water at 25ºC.
a. saturated
b. supersaturated
c. diluted
d. concentrated

Answer 1

Answer:

The correct answer is option d.

Explanation:

204 grams of sugar will dissolve in 100 grams of water at 25ºC.

At 25°C , mass of sugar soluble in 100 grams of water = 204 grams

At 25°C, mass of sugar soluble in 1 grams of water =

$\frac{204}{100}=2.04 g$

Maximum amount of sugar soluble in 50 grams of water at 25°C:

$50\times 2.04 g=102 g$

After mixing 102 gram in 50 grams of water solution will become saturated.

Here we have 55 grams of sugar in 50 grams of water which solution is not saturated. But in comparison to solution with 5 grams of sugar and 50 grams of water the former solution is concentrated.

Answer 2

It is (B) supersaturated solution.