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GCSE
Chemistry paper 1
Moles, Concentration & Volume Calculations
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Created by
Mabli Collyer
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Cards (22)
What does the equation link in chemistry?
Number of
moles
, concentration, and
volume
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How is volume measured in this context?
In
decimeters cubed
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How is concentration expressed in this context?
Moles
per
decimeter
cubed
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What does the forward slash in concentration notation indicate?
It means
per
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What do the letters n, c, and v represent in the formula?
n for
moles
, c for
concentration
, v for
volume
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How do you convert 800 centimeters cubed to decimeters cubed?
Divide by
1000
to get 0.8
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What is the total number of moles in 800 cm³ of sodium hydroxide at 0.2 moles/dm³?
0.16
moles
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How do you find the concentration of hydrochloric acid given 0.6 moles in 1.5 dm³?
Divide
moles
by
volume
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What is the concentration of hydrochloric acid if it contains 0.6 moles in 1.5 dm³?
0.4 moles per
decimeter cubed
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What is the first step in solving for an unknown concentration or volume?
Identify
known
values
from the question
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How do you convert 30 cm³ to decimeters cubed?
Divide by
1000
to get
0.03
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How do you convert 25 cm³ to decimeters cubed?
Divide by
1000
to get 0.025
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What is the basic idea for solving these types of chemistry questions?
Calculate
moles
, use
molar ratio
, find
concentration
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How do you calculate moles of potassium hydroxide from its concentration and volume?
Multiply
concentration by volume
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How many moles of potassium hydroxide are in 0.5 moles/dm³ and 0.03 dm³?
0.015 moles
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How do you determine the molar ratio between potassium hydroxide and sulfuric acid?
By looking at the
coefficients
in the equation
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What is the molar ratio of potassium hydroxide to sulfuric acid in this scenario?
2 to 1
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How do you find moles of sulfuric acid from moles of potassium hydroxide?
Divide moles of potassium hydroxide by
2
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How many moles of sulfuric acid are produced from 0.015 moles of potassium hydroxide?
0.0075
moles
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How do you calculate the concentration of sulfuric acid?
Divide
moles
by
volume
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What is the concentration of sulfuric acid if it has 0.0075 moles in 0.025 dm³?
0.3 moles per
decimeter cubed
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What are the steps to calculate an unknown concentration in a chemical reaction?
Identify known values (volume, concentration)
Convert volumes to
decimeters cubed
Calculate
moles
of known substance
Use
molar ratio
to find moles of unknown
Calculate concentration of
unknown substance
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