# Steel stroy revison

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what does number of moles equal?
mass/molar mass or volumexconcentration
1 of 14
how do you calculate percentage yield?
mass of useful products/mass of all reactants x100
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how much space does 1 mole of gas occupy?
24dm^3
3 of 14
how do you combine half equations?
first you write out the two half equations and then reverse the one with the most negative electrode potential, then balance so both equations have the same number of electrons and then make into one equation.
4 of 14
how do you calculate unknown concentrations?
first write a balanced equation, then work out the moles of the substance that you know the concentration of to figure out what the moles are of the unknown concentration. then use the known moles and volume from titration to work out concentration.
5 of 14
what is a coordination number in a complex?
it is the number of bonds that a central metal atom or ion can form with ligands, ie coordination number 6 means it can have a maximum of 6 ligands attached to it.
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what does OILRIG stand for?
Oxidation Is Loss Reduction Is Gain
7 of 14
define a redox reaction.
a reaction where oxidation and reduction both occur.
8 of 14
what is hydrogen and oxygen's oxidation state?
hydrogen- +1 oxygen-2 except when attached to fluorine.
9 of 14
define standard electrode potential.
it is the tendency of a molecule to gain electrons, the more positive it is, the more likely it is to gain electrons.
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how do you calculate the electrode potential of a cell?
=more postive-less positive
11 of 14
what colour is aqueous fe2+?
green solution
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what colour is aqueous fe3+?
yellow solution.
13 of 14
how do you use a colirimeter?
choose a suitable filter/complementary colour, then use water to zero the colorimeter, measure the absorbance of the solution and plot a calibration curve.
14 of 14

## Other cards in this set

### Card 2

#### Front

how do you calculate percentage yield?

#### Back

mass of useful products/mass of all reactants x100

### Card 3

#### Front

how much space does 1 mole of gas occupy?

### Card 4

#### Front

how do you combine half equations?

### Card 5

#### Front

how do you calculate unknown concentrations?