What is a hydrate in the context of ionic compounds?

Hydrates and Their Properties

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Chemistry
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9th - 10th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A compound that cannot dissolve in water
A compound with no water molecules
A compound with water molecules in its crystal structure
A compound that is always in liquid form
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the notation of hydrates, what does the dot represent?
A multiplication sign
A division sign
An association of water molecules
A subtraction of water molecules
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for compounds that do not contain water molecules?
Hydrated
Anhydrous
Saturated
Dissolved
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the percent by mass of water in a hydrate if a 50g sample contains 27.2g of the ionic compound?
45.6%
72.8%
54.4%
27.2%
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why must barium hydroxide hydrate be stored in tightly sealed bottles?
It is highly flammable
It reacts with oxygen
It reacts with carbon dioxide
It evaporates quickly
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in calculating the percent by mass of water in a hydrate?
Dividing the mass of water by the total mass
Subtracting the mass of the ionic compound from the total mass
Calculating the molar mass of the ionic compound
Finding the total mass of the sample
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you calculate the number of moles of water in a hydrate?
By dividing the mass of water by the molar mass of water
By multiplying the mass of water by the molar mass of water
By dividing the mass of water by the molar mass of the ionic compound
By adding the mass of water to the molar mass of the ionic compound
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