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Chemistry AQA equations GCSE

What equations must i need to know for AQA higher Chemistry? I've searched google so much but cant find an actual list of ALL the equations i NEED to know
Reply 1
Equations? Do you mean all the ions?
Reply 2
Original post by Stargirl2.0
What equations must i need to know for AQA higher Chemistry? I've searched google so much but cant find an actual list of ALL the equations i NEED to know


Hey, I'm doing my A-levels now so I've kind of forgotten which ones they exactly are, but you should try Quizlet- it should help x
Original post by Deggs_14
Equations? Do you mean all the ions?

No like atom economy equation etc. And others I can't remember bc that's why I put this post up 😂
Reply 4
The hydrolysis of water as this is used in alkaline hydrogen-oxygen fuel cells.
O2 + 2H2O + 4e- —-> 4OH- (reduction)
2H2 + 4OH- —-> 2H2O + 4e- (oxidation)
Overall O2 + 2H2O —-> 2H2O
Here's some of them?: Screenshot_20200209_110938.jpg
Reply 6
Original post by Stargirl2.0
No like atom economy equation etc. And others I can't remember bc that's why I put this post up 😂


Oh in this case,
atom economy = Mr of useful products / Σ Mr of all reactants) x 100
% yield, = (theoretical yield / actual yield) x 100
mol = mass / Mr,
concentration = moles / volume in dm^3,
dm^3 = cm^3 / 1000,
Number of particles = mol x Avogadro constant (6.022x10^-23 mol^-1)
Isotopic abundance = (abundance of isotope 1 / total abundance x Mr) + (abundance of isotope 2/ total abundance x Mr) + ... + (abundance of isotope n / total abundance x Mr)
(edited 4 years ago)
Reply 7
Mass = Mr x mole
Mr = add together the Ar of every atom in the compound
Conc = mass / vol
Conc = moles / vol
Atom economy = useful mass / total mass
Percentage yield = actual yield / expected yield * 100%
RFM of a substance = (Abundance of isotope 1 x Mass of isotope 1) + (Abundance of isotope 2 x Mass of isotope 2)
Original post by 19n19
Mass = Mr x mole
Mr = add together the Ar of every atom in the compound
Conc = mass / vol
Conc = moles / vol
Atom economy = useful mass / total mass
Percentage yield = actual yield / expected yield * 100%
RFM of a substance = (Abundance of isotope 1 x Mass of isotope 1) + (Abundance of isotope 2 x Mass of isotope 2)

Lmao you literally copied what was on the picture above
Reply 9
Original post by 1st superstar
Lmao you literally copied what was on the picture above

I searched it up to help @Stargirl2.0 and this came up on the student room, so I got it for her. You posted it two seconds before me so chill x
Original post by 19n19
I searched it up to help @Stargirl2.0 and this came up on the student room, so I got it for her. You posted it two seconds before me so chill x

But it's ok lol
Original post by 19n19
Mass = Mr x mole
Mr = add together the Ar of every atom in the compound
Conc = mass / vol
Conc = moles / vol
Atom economy = useful mass / total mass
Percentage yield = actual yield / expected yield * 100%
RFM of a substance = (Abundance of isotope 1 x Mass of isotope 1) + (Abundance of isotope 2 x Mass of isotope 2)

Thanks, appreciate it xx

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