Yeah that is weird. For these kind of things its probably best to go by the user guide since thats the official edexcel version, even if it may be wrong
The edexcel revision guide i have says that a green ppt that is formed which stays as a green ppt with excess NH3. No green solution?
Lol this is the problem. Go by the user guide, but bear in mind that when I actually did the practicals half of these results are utter rubbish - maybe like 0.1% of our chromium thing redissolved if that
Lol this is the problem. Go by the user guide, but bear in mind that when I actually did the practicals half of these results are utter rubbish - maybe like 0.1% of our chromium thing redissolved if that
probably a dumb question but whats the user guide you mentioned?
Does anyone have a picture of the 3 titration graphs we need to know along with the values e.g. start pH, equivalence point, end pH, range of vertical section etc.? Thanks in advance, I REALLY need help with these!
Does anyone have a picture of the 3 titration graphs we need to know along with the values e.g. start pH, equivalence point, end pH, range of vertical section etc.? Thanks in advance, I REALLY need help with these!
Haha yeah I did decent in it (78/90). you guys probably got high 80s or something but
nah i got 81 but in the exam i would have got 85 as i wouldn't have tried to do the ester Kc one in my head and thought it was 0.004 when doing parts and 0.04 in others haha
nah i got 81 but in the exam i would have got 85 as i wouldn't have tried to do the ester Kc one in my head and thought it was 0.004 when doing parts and 0.04 in others haha
loool nice xD I messed up on the Kc one :/ But now I understand that the NaOH reacts with the ethanoic acid and HCl once equilibrium has been reached xD I'm not feeling too bad for unit 4 tbh. Unit 5 is alright too, but I've only been scraping As by one or two marks :/
loool nice xD I messed up on the Kc one :/ But now I understand that the NaOH reacts with the ethanoic acid and HCl once equilibrium has been reached xD I'm not feeling too bad for unit 4 tbh. Unit 5 is alright too, but I've only been scraping As by one or two marks :/
I haven't done any unit 5 papers yet ill do some in the next few days. At least I have quite a big margin for error if a paper is filthy thankfully