Unit 4b: Hydrates Review

A compound is a hydrate when it...

• is composed of only hydrogen and oxygen
• is a state of water
• traps water inside of the compound
• repels water from the compound

Name the following hydrate:  NaCl ⋅ 5H₂O

• sodium chloride 

• sodium monochloride pentahydrate

• sodium chloride pentahydrate

• pentahydrate

Name the following ionic compound: MgSO₄ ⋅ 7H₂O

• magnesium sulfite hexahydrate

• magnesium monosulfate hexahydrate

• magnesium sulfate heptahydrate

• magnesium sulfite heptahydrate

A 15.67 g sample of a hydrate of magnesium carbonate was heated to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate?

• MgCO₃ · 5H₂O

• MgCO₃ · 4H₂O

• MgCO₃ · 6H₂O

• MgCO₃ · H₂O

Tags

NGSS.HS-PS1-7

Calculate the percent by mass of water in the hydrate FeCl₃⋅ 6H₂O. Round percent to the tenth place.

Which of the following is an anhydrous compound?

• Na₂CO₃ ⋅ 5H₂O

• CoCl₂

• K₂O ⋅ 3H₂O

• ZnSO₄ ⋅ 4H₂O