What is the primary ingredient in classroom chalk?

Solubility and Composition of Chalk

Interactive Video
•
Chemistry
•
6th - 8th Grade
•
Hard

Emma Peterson
FREE Resource
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9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Magnesium oxide
Sodium chloride
Calcium carbonate
Calcium sulfate
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is calcium carbonate considered insoluble in water?
It sinks to the bottom without dissolving
It evaporates
It reacts with water
It dissolves completely
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you confirm the insolubility of calcium carbonate?
By heating it
By using a solubility table
By tasting it
By freezing it
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main component of sidewalk chalk?
Calcium carbonate
Calcium sulfate
Sodium bicarbonate
Potassium nitrate
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the 's s' notation in the solubility table indicate for calcium sulfate?
Slightly soluble
Not listed
Highly soluble
Insoluble
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when you put sidewalk chalk in water?
It remains unchanged
It reacts violently
It dissolves completely
A small amount dissolves
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for calcium sulfate with two water molecules?
Trihydrate
Dihydrate
Monohydrate
Anhydrous
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of chalk is more soluble in water?
Classroom chalk
Neither is soluble
Both are equally soluble
Sidewalk chalk
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main difference in solubility between classroom and sidewalk chalk?
Both are highly soluble
Both are insoluble
Sidewalk chalk is more soluble
Classroom chalk is more soluble
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