General Facts-Module 2

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  • Created by: katelees
  • Created on: 22-01-17 14:02
What is the RAM?
The ratio of the average mass of one atom of an element to a twelfth of the mass of the atom of C12.
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What is mass spectrometry used for?
To identify an unknown compound.
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What is an ionic compound?
A metal and a non-metal that are chemically bound.
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What structure do ionic compounds have?
They have a giant lattice structure.
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What is water of crystallisation?
The number of moles of water that associate with each mole of hydrated salt.
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What is the ideal gas law?
pV=nRT
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What is the definition of an acid?
It donates H+ ions and is neutralised by bases and has a pH
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What is the definition of a base?
It donates OH- ions and is neutralised by acids and has a pH >7 and is a proton acceptor.
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What does pH stand for?
Potential hydrogen.
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How do strong acids dissociate?
Fully
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How do weak acids dissociate?
Partially.
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Acid+Metal
Salt+Hydrogen
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Acid+Alkali
Salt+Water
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Acid+metal oxide
Salt+water+carbon dioxide
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Acid+carbonate
Salt+water
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What is the oxidation state of an atom?
0
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What happens to the oxidation number if the element is oxidised?
It goes up.
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What happens to the oxidation number if the element is reduce?
It goes down.
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How do you calculate percentage uncertainty?
(precision error/reading)x100
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What is the electronic configuration for the first 5 shells?
2,8,8,18,18
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What are s-orbitals?
They hold 2 electrons which spin in the opposite direction.
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What are p-orbitals?
They have a 8 shape and hold 3 pairs of electrons.
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What are d-orbitals?
They hold 5 pars of electrons.
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What is the Pauli exclusion principle?
Each orbital can hold two electrons of opposite spin.
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What is the Aufbau principle?
The electrons fill the lowest energy orbitals first.
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What is Hund's rule?
Within a sublevel, place one electron per orbital before pairing them.
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Card 2

Front

What is mass spectrometry used for?

Back

To identify an unknown compound.

Card 3

Front

What is an ionic compound?

Back

Preview of the front of card 3

Card 4

Front

What structure do ionic compounds have?

Back

Preview of the front of card 4

Card 5

Front

What is water of crystallisation?

Back

Preview of the front of card 5
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