Chemistry AQA equations GCSE

Watch this thread
username3787036
Badges: 16
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 2 years ago
#1
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
0
reply
Ðeggs
Badges: 22
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 2 years ago
#2
Equations? Do you mean all the ions?
0
reply
19n19
Badges: 7
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report 2 years ago
#3
(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
0
reply
username3787036
Badges: 16
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#4
Report Thread starter 2 years ago
#4
(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 😂
0
reply
Ðeggs
Badges: 22
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#5
Report 2 years ago
#5
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
0
reply
1st superstar
Badges: 22
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#6
Report 2 years ago
#6
Here's some of them?: Name:  Screenshot_20200209_110938.jpg
Views: 294
Size:  99.7 KB
0
reply
Ðeggs
Badges: 22
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#7
Report 2 years ago
#7
(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 = (Σ 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)
Last edited by Ðeggs; 2 years ago
0
reply
19n19
Badges: 7
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#8
Report 2 years ago
#8
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)
0
reply
1st superstar
Badges: 22
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#9
Report 2 years ago
#9
(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
0
reply
19n19
Badges: 7
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#10
Report 2 years ago
#10
(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
1
reply
1st superstar
Badges: 22
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#11
Report 2 years ago
#11
(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
0
reply
username3787036
Badges: 16
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#12
Report Thread starter 2 years ago
#12
(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
2
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest

How are you feeling about your results?

They're better than I expected (68)
42.24%
They're exactly what I expected (36)
22.36%
They're lower than I expected (57)
35.4%

Watched Threads

View All