What is the solubility of a salt if 0.4g of it is obtained on evaporating 200cm³. What is the solubility of a salt if 0.4g of it is obtained on evaporating 200cm3 of its saturated solution to dryness? of its saturated solution to dryness?

A. 0.08gdm ‾³
B. 2.00gdm ‾³
C. 8.00gdm ‾³
D. 80.00gdm ‾³

Correct Answer: Option B

B. 2.00gdm ‾³

Explanation

1000cm³ = 1dm³
200cm³ = 0.2dm³
⇒ 0.2dm³ contains 0.4g

hence, the solubility of the salt which is the amount of the salt dissolvable in 1dm³ is

0.4g/0.2dm³=2.0gdm ‾³