F334 (19/06/2013 9:00AM) - Salters Chemistry (Chemistry of Materials) Revision Thread

I guessed and put neutral too

What did people get for the 6 mark calculation?


Posted from TSR Mobile

i got 1.69

1.69 (6)
0.086 s-1 (3)
Redox Titration:
Fill burette with MnO4- solution
use volumetric pipette to transfer c2o4 into conical flask
heat to 60C and keep at 60C throughout experiment
Stop adding Mno4 when turns permanent pink colour
Indicator not needed because turns permanent pink colour
End point at permanent pink colour

Did anyone put alkaline for the zwitterion one? i dont see why the OH group of the phenol wouldn't react, as it didn't say there was only 1 mole of water of something

Did anyone get methanol and methanoic acid

formula of complex ion was [Fe(C2O4)3)]3-
shape octahedral

that's all I can remember right now

Yep apart from I got methanoic acid and hcl


Posted from TSR Mobile

1.69 (6)
0.086 s-1 (3)
Redox Titration:
Fill burette with MnO4- solution
use volumetric pipette to transfer c2o4 into conical flask
heat to 60C and keep at 60C throughout experiment
Stop adding Mno4 when turns permanent pink colour
Indicator not needed because turns permanent pink colour
End point at permanent pink colour

Did anyone put alkaline for the zwitterion one? i dont see why the OH group of the phenol wouldn't react, as it didn't say there was only 1 mole of water of something

Did anyone get methanol and methanoic acid

formula of complex ion was [Fe(C2O4)3)]3-
shape octahedral

that's all I can remember right now

I put acidic... not sure if it is the right answer, because in the question it said 'in aqueous solution' so i thought the phenol would donate a proton and the carboxylic acid would donate a proton but the amine would take a proton... so in general there is an extra proton in the solution so I said acidic.

i agree with you on that complex question and titration question. about that methanoic acid question.... question said two acids are formed so i out methanoic acid and ethanoic acid... dont know if im right ???

Yep apart from I got methanoic acid and hcl


Posted from TSR Mobile

not sure, in the revision guide it gives how acidic alcohols, phenols, carboxylic acids are so i assumed that methanol can be classed as an acid?

i agree with you on that complex question and titration question. about that methanoic acid question.... question said two acids are formed so i out methanoic acid and ethanoic acid... dont know if im right ???

HCl ? the question said it CH3OH and CH3OH were oxidised to form two acids... I dont see how HCl is a product of the oxidation... when the two initial substance dont have Cl in them.