Chemistry

All these questions and answers are from the AQA AS Chemistry textbook.

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What is the moles equation for moles of a solid?
Moles=mass/Mr
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What is the moles equation for moles in a liquid?
Moles = conc. x vol(dm^3)
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How many particles are there in a mole?
6.02x10^23 aka Avogadro's constant
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How many cm^3 are there in a dm^3
1000
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What is the ideal gas equation?
pV=nRT where n=number of moles
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What is a standard solution?
Any solution you know the exact concentration of
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What piece of equipment would you use to measure a set volume of an acid/alkali for a titration?
Pipette
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What is the end point of a titration?
The point where the indicator changes colour, enough acid to neutralise the alkali
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What does the empirical formula represent?
Smallest whole number ratio of atoms in a moecule
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What does the molecular formula represent?
Actual number of atoms in a molecule
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What is the theoretical yield?
The mass of product that should e formed in a chemical reation
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What is the formula for percentage yield?
actual yield/theoretical yield x100
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What is meant by atom economy?
A measure of the proportion of reactant atoms that become a part of the desired product
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What are the advantages from a process with high atom economy?
Better for environment, less expensive,
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What is the formula for calculating atom economy?
molecular mass of desired product/sum of molecular masses of all reactant x 100
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Other cards in this set

Card 2

Front

What is the moles equation for moles in a liquid?

Back

Moles = conc. x vol(dm^3)

Card 3

Front

How many particles are there in a mole?

Back

Preview of the front of card 3

Card 4

Front

How many cm^3 are there in a dm^3

Back

Preview of the front of card 4

Card 5

Front

What is the ideal gas equation?

Back

Preview of the front of card 5
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