Chemistry: Matter and Change

Section 5: The Formula for a Hydrate

Self Check Quizzes

1
What is the correct chemical formula for barium hydroxide octahydrate?

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A)Ba(OH)2 . 8H2O
B)Ba(OH)2 . H2O
C)8Ba(OH)2 . H2O
D)Ba . 8(OH)2
2
Which word indicates that two water molecules are associated with a substance in a chemical compound?
A)mono-
B)di-
C)tri-
D)an-
3
A hydrate is a compound that has a specific number of water molecules bound to its atoms. How many water molecules are bound to the hydrate shown in the circle graph?

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A)6
B)7
C)8
D)10
4
One application of chemicals that can absorb water to form hydrates is as water-absorbing ________.
A)surfactants
B)hydrators
C)dessicants
D)antiseptics
5
What is the best method for removing water from a hydrated compound?
A)freezing
B)filtration
C)distillation
D)heating
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