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one more question, sorry, i know i am asking too much, Do you know what the titration value is or values which are near to the correct one?
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Chemistry: Post your doubts here!
- Thread starter XPFMember
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Titration values vary centre to centre. Ask the people who performed in the same place as you for accurate reading
it's ok, my cousin got totally wrong, she got around 28, her teacher and classmates got around 29.4
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They all got titration values around 29.5-29.8, i got my rough value as 29.6 and both trials 1 and 2 were 29.3 and 29.4, does this mean i am wrong? . I thought all candidates who took the same paper would be expected to get the same values. Maayee sorry for that hope he/she does well on paper 1 .Titration values vary centre to centre. Ask the people who performed in the same place as you for accurate reading
well i think u would only lose marks for accuracy but even some people did get 29.5 from ur centre and ur average titre is 29.4, so i think then it's fine... u dont need to worry that much...you will probably get good marks insha allah
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When not specified in question use the formula which shows maximum information, skelatal formulas are best for that.
But does it matter if I make displayed formula ? Cause I always make mistakes in it
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Then u should give all the information asked in question via displayed formula
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That would require anhydrous FeBr3 catalyst and pure bromine.
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Benzene does not react with bromine water, pure bromine and anyhdyrous FeBr3 is required in order for the benzene ring to react.
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inshallah your cousin too, thanks that made me feel better.well i think u would only lose marks for accuracy but even some people did get 29.5 from ur centre and ur average titre is 29.4, so i think then it's fine... u dont need to worry that much...you will probably get good marks insha allah
But the other Beene with OH is reacting.. I know it's a ring activator but won't the oxygen of ester activate the ring too?
CONFUSED
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I don't know exactly what conversation is going on so sorry to interrupt but the oxygen of the ester would not be bonded directly to the benzene ring. it would be bonded to a carbon atom which would be bonded to the ring.
I am confused in the ring on the top which has oxygen direct,y attached to it
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I have a couple of questions which I was hoping somebody could help me out with.
1- Any notes on the Soil treatment(sorbents and stuff) and nano technology of applications, I got less time so something short will be appreciated.
2- I just want to confirm the conditions for ester hydrolysis. is it the same as that of hydrolysis of an amide linkage?
1- Any notes on the Soil treatment(sorbents and stuff) and nano technology of applications, I got less time so something short will be appreciated.
2- I just want to confirm the conditions for ester hydrolysis. is it the same as that of hydrolysis of an amide linkage?
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you can revise the application chapter 3 from chemguideforcie.co.uk much quicker than from other places because he has given the reference to all of the latest exam questions and what was asked in them. which means you will be able to revise everything that has come in exams till now.
yes. the conditions+reagent for hydrolysis are 'dilute HCL(aq) or H2SO4(aq) + heat' or you can write H+(aq) + heat
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another thing:
when we use KMnO4 on alkyl benzene.
say we had benezene-CH2CH3.
what would be the product?
benzene-COOH or benzene-CH2COOH
also:
halogenation of phenol has 2 cases,
one where Br(l) in a non-polar solvent is used. a mixture of 2-bromo phenol and 4-bromo phenol is produced
and one Br(aq)
2,4,6, bromo phenol produced.
is this correct?
btw.. thank you soo much Suchal Riaz
I remember you from last year bro,
congrats soo much on your distinction(saw your name in the list in feb and was soo happy for you). MashAllah!
when we use KMnO4 on alkyl benzene.
say we had benezene-CH2CH3.
what would be the product?
benzene-COOH or benzene-CH2COOH
also:
halogenation of phenol has 2 cases,
one where Br(l) in a non-polar solvent is used. a mixture of 2-bromo phenol and 4-bromo phenol is produced
and one Br(aq)
2,4,6, bromo phenol produced.
is this correct?
btw.. thank you soo much Suchal Riaz
I remember you from last year bro,
congrats soo much on your distinction(saw your name in the list in feb and was soo happy for you). MashAllah!
- Messages
- 1,983
- Reaction score
- 3,044
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- 273
This was actually a blunder CIE made. They shouldn't have given this question because average students dont know that in COO there is a delocalisation between COO like this:
so the lone pair that is actually donated to the ring is used up in this delocalisation that means that the ring isn't 'activated' as you call it.