The data shown was obtained by a student in order to determine the percent of water in a hydrate:

Mass of Hydrate = 5.0 grams

Mass of Anhydrous Compound = 3.0 grams

What is the percent of water in the hydrate?

a. 82%

b. 60%

C. 30%

d. 40%

Option-B (60%) is the correct answer.

Explanation:

To solve this problem first we will calculate the mass of hydrated compound as,

Hydrated Compound = Mass of Anhydrous Compound + Mass of Hydrate

Hydrated Compound = 3.0 g + 5.0 g

Hydrated Compound = 8.0 g

Secondly, we will apply following formula to find percent of water in hydrated compound,

%H₂O = Mass of H₂O / Mass of Hydrated Compound * 100

Putting values,

%H₂O = 5.0 g / 8.0 g * 100

%H₂O = 62.5 % ≈ 60%