Hydrate Warm Up

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 · 1H₂O

Tags

NGSS.HS-PS1-7

A hydrate of magnesium chloride is present and the following data is collected:
mass of crucible = 22.130 grams
mass of crucible + hydrate = 25.290 grams
mass of crucible and contents after heating = 23.491 grams
What is the complete formula of this hydrate?

• MgCl₂ · 7H₂O
• MgCl₂ · 11H₂O
• MgCl₂ · 6H₂O
• MgCl₂ · 13H₂O

Tags

NGSS.HS-PS1-7

Determine the formula of CuSO₄·?H₂O hydrate given the following data:

Test Tube = 23.56 g

Test Tube + Hydrate = 26.06 g

Test Tube + Anhydrate = 25.16 g

• CuSO₄·H₂O

• CuSO₄·2H₂O

• CuSO₄·4H₂O

• CuSO₄·5H₂O

Tags

NGSS.HS-PS1-7