Quantitative Chemistry

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  • Created by: lh1002
  • Created on: 28-05-16 17:23
What are the 2 different units that can be used for concentration?
mol/dm³ or g/dm³
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What are the symbols for relative formula mass (RFM) and relative atomic mass (RAM)?
RFM= Mr, RAM= Ar
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What is the equation for percentage yield?
actual yield/theoretical yield x 100%
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What is the equation for atom economy?
Mr of desired products/Mr of all products x 100
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What is atom economy?
The atom economy is a measure of the amount of starting materials that end up as useful products. It is important for sustainable development and for economic reasons to use reactions with high atom economy.
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What is theoretical yield?
The mass you produce
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What is titration?
A method of finding an unknown concentration with a solution with a known concentration
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What is the equation for moles?
Moles= mass/Mr
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To convert cm³ to dm³ what do you do?
/1000
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What is a limiting reagent/reactant?
The reactant which runs out
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What are the units for volume?
dm³ or cm³
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What are the two equations for finding concentration?
Mass/volume, moles/volume
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What is the equation for finding the volume of a gas at rtp?
volume of gas at rtp = number of moles × 24
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What is the equation for finding the volume of a gas at stp?
volume of gas at stp = number of moles × 22.4
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What is Avogadro's number?
One mole of atoms contains 6 x 10²³ atoms, no matter what element it is
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What does the law of conservation of mass state?
No atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactants.
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What are some reasons to why it is not always possible to obtain the calculated amount of a product?
The reaction may not go to completion because it is reversible; some of the product may be lost when it is separated from the reaction mixture; some of the reactants may react in ways different to the expected reaction.
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What is percentage yield also known as?
Percentage mass
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Other cards in this set

Card 2

Front

What are the symbols for relative formula mass (RFM) and relative atomic mass (RAM)?

Back

RFM= Mr, RAM= Ar

Card 3

Front

What is the equation for percentage yield?

Back

Preview of the front of card 3

Card 4

Front

What is the equation for atom economy?

Back

Preview of the front of card 4

Card 5

Front

What is atom economy?

Back

Preview of the front of card 5
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