Edexcel A2 Chemistry 6ch04/05 JUNE 2015

guys, can anyone show me how to draw that apparatus for the nitration of benzene?
edexcel are really harsh, the have canceled the benefit of doubt thingie, and as a second language learner I find it really hard to get the exact wording ://// need an A to get to my first choice ;'(

is this for an exam quesion?

I'm so terrible at the section c nmr questions 😩
Does anyone have access to/know where I can find practice questions (that aren't post 2008 edexcel questions)?


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Why is there hardly anyone posting on this thread? D:

No idea!
Btw I think there should be separate unit 4 and 5 threads???

good point i mentioned that too earlier..

good point i mentioned that too earlier..

Omg I remember you from last year!

Can this be the unit 4 thread then? And a separate unit 5 thread can be created???

x

i suggest we ditch this thread and make a new one.. or leave a note to the mods to rename this group to unit 4 and you can make a unit 5 thread

http://www.thestudentroom.co.uk/showthread.php?t=3247585&p=54850291#post54850291 Unit 5 thread everyone!!

So this is now unit 4?

For example how would you work out the Ph of a mixture when 25cm3 of ethanoic acid 0.5M is added to 20cm3 of NaOH 0.5M ? :/

Yea if thats okay



Well you know that ethanoic acid and sodium hydroxide react with a stoichiometric ration of 1 so there are going to be 5cm3 of acid left. That's 2.5x10^-3 moles of acid. Then use the eqn a=vc again with the total volume of solution so 2.5x10^-3=0.045 x c. Then go on as usual for pH calculations

However if they gave you reactants with different states or pH values (such as sodium ethanoate solid and ethanoic acid) you would have to use Ka values.

I think I've sorted it I've found quite an easy way from the internet! Thanks! I've been looking for the past half an hour haha and yeah its not a problem this thread isn't very active for some reason :/ I didn't think anyone would reply!