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Chemistry Cognito
3.6 Concentration Calculations (grams/dm^3)
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Created by
George Sakelarov
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Cards (16)
What is the measurement of volume equal to 1,000 centimeters cubed?
One
decimeter
cubed
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What is the equation for calculating concentration?
Concentration
is
mass
divided by
volume
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How is mass measured in the concentration formula?
In
grams
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How is volume measured in the concentration formula?
In
decimeters cubed
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What does the horizontal line in a formula triangle represent?
The horizontal line means
divide
The
vertical line
means multiply
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How would you find the concentration using the formula triangle?
Cover up the 'c' and do
mass
divided by volume
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If you have 40 grams of sodium hydroxide in 2.5 decimeters cubed of water, what is the concentration?
16 grams
per decimeter cubed
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How can we express grams per decimeter cubed in a different notation?
As
grams per dm
<sup>-3</
sup
>
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How do you convert 480 centimeters cubed to decimeters cubed?
By dividing by
1000
to get
0.48
decimeters cubed
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What is the concentration of 24 grams of copper sulfate in 0.48 decimeters cubed of water?
50
grams per decimeter cubed
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Why is it important to check the units of the figures given in concentration problems?
Because incorrect units can lead to mistakes in
calculations
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If a sample of hydrochloric acid has a concentration of 20 grams per decimeter cubed and a volume of 400 centimeters cubed, what mass of hydrogen chloride is in the solution?
8
grams
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How do you convert 400 centimeters cubed to decimeters cubed?
By dividing by
1000
to get 0.4 decimeters cubed
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What calculation do you perform to find the mass using concentration and volume?
Mass
equals
concentration
times
volume
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What are the key steps to calculate concentration from mass and volume?
Identify mass in
grams
Identify volume in
decimeters
cubed
Use the formula:
Concentration
=
Mass
/
Volume
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What are common pitfalls in concentration calculations?
Using incorrect units (e.g.,
kilograms
instead of grams)
Not converting volume to
decimeters cubed
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