GCSE Chemistry Edexcel Equations
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Last updated 6:32 PM on 11/10/22
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56 Terms
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Mass= (2 equations)
Moles x Mr or Ar
Concentration x volume
Concentration x volume
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Concentration=
Moles/ volume
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Concentration in g/dm^3=
Concentration in moles/dm^3 x RFM
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Volume (gas)=
Moles x 24 (gas constant)
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Mass of atom=
Ar (RAM)/ avogadros constant
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What is avogadros constant?
6.02x 10^23
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Rf (chromatography)=
Distance travelled by solute/ distance travelled by solvent
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Acid + metal oxide ->
Salt + water
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Acid + metal hydroxide ->
Salt + water
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Acid + metal ->
Salt + hydrogen
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Acid + metal carbonate ->
Salt + water * carbon dioxide
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Percentage yield=
Actual yield/ theoretical yield *100
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Atom economy=
Total Mr of desired product/ total Mr of all products * 100
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Molar volume=
Volume/ moles
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Alkali metal + water ->
Metal hydroxide + hydrogen
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Alkali metal + oxygen ->
Metal oxide
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Rate of reaction=
Amount of reactant used or product formed/ time
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Gradient=
Change in y/ change in x
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Bond energy change=
Reactants - products
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Total/ complete combustion=
Hydrocarbon (fuel) + oxygen -> carbon dioxide + water.
Oxygen is in excess
Oxygen is in excess
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Partial/ incomplete combustion=
Hydrocarbon (fuel) + oxygen -> carbon monoxide + water
Oxygen is limited
Oxygen is limited
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What is the general formula for alkanes?
CnH2n+2
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What is the general formula for alkenes?
CnH2n
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Carboxylic acid + alcohol ->
Ester + water
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What is the general formula for alcohol?
CnH2n+1OH
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What is the general formula for a carboxylic acid?
CnH2n+1COOH
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Alcohol + oxygen ->
Carboxylic acid
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What is the fermentation equation?
Glucose —(yeast + water)—> ethanol + carbon dioxide
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Carboxylic acid + metal ->
Salt + hydrogen
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Carboxylic acid + bases
Salt + water
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Carboxylic acid + carbonate ->
Salt + water + carbon dioxide
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What is the symbol for ammonia?
NH3
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What is the aluminium ion?
Al^3+
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What is the ammonium ion?
NH4^1+
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What is the barium ion?
Ba^2+
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What is the bromide ion?
Br^1-
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What is the calcium ion?
Ca^2+
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What is the carbonate ion?
CO3^2-
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What is the chloride ion?
Cl^1-
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What is the copper (II) ion?
Cu^2+
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What is the fluoride ion?
F^1-
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What is the hydrogen ion?
H^1+
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What is the hydroxide ion?
OH^1-
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What is the iodide ion?
I^1-
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What is the iron (II) ion?
Fe^2+
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What is the iron (III) ion?
Fe^3+
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What is the lithium ion?
Li^1+
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What is the magnesium ion?
Mg^2+
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What is the nickel ion?
Ni^2+
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What is the nitrate ion?
NO3^1-
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What is the oxide ion?
O^2-
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What is the potassium ion?
K^1+
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What is the silver ion?
Ag^1+
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What is the sodium ion?
Na^1+
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What is the sulfate ion?
SO4^2-
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What is the zinc ion?
Zn^2+