Lesson 21. Calculating concentration

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ChemSecondary Education

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______ is a reactant that is not in excess in a chemical reaction.
A
Limiting reactant
B
Limiting condition
C
Catalyst

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Enquiry questionDoes a chemical reaction stop when the reactant is used up?
YES
NO

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Agree or disagree. The amount of product is directly proportional to the amount of the limiting reactant.
AGREE
DISAGREE

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Question: Which reactant is in excess and which is the limiting reactant?

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STEP 1. Write the balanced symbol equation.
STEP 2. Determine the molar ratio.
STEP 3. Calculate the moles of each reactant.
STEP 4. Compare the moles.

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______ a solid substance that dissolves in a liquid.
A
Solute
B
Solvent
C
Solution
D
Opaque

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_____ is the liquid that dissolves the solid substance.
A
Solute
B
Solvent
C
Solution
D
Opaque

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Most chemical reactions occur between solutes which are dissolved in solvents. Which of the following is NOT an example of a solvent?
A
silver nitrate
B
oil
C
water
D
ethanol

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______ refers to the amount of solute there is in a specific volume of the solvent.
A
Solubility
B
Concentration
C
Insoluble
D
Saturation

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The greater the amount of solute in a given volume, the _________ the concentration.
A
lesser
B
greater
C
more saturated
D
less saturated

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Which of the following units can be used to express the amount of solute?
A
grams
B
moles
C
both A and B
D
liters

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Which of the following units can be used to express the concentration of a solution in 1 L of solvent?
A
g / dm^3
B
moles / dm^3
C
moles / mL
D
both A and B

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Enquiry question
Which solution is more concentrated?

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  • Monday - Lesson 22 | Titration Calculations
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