Edexcel CHEMISTRY DOUBTS!!!!

[~ Miss Relina ~]

^ Oh thank you get it now 

I really wonder at times how do I pass my exams 

welcome
me too  sometimes i feel i am stuck  and i have the same ideas too 

[Mike Benn]

FInally A2 started..!!

[Romeesa-Chan]

FInally A2 started..!!

Good luck with it!

Hated A2 Chem very much! =X

[Malak]

Can anyone tell me why using a gas syringe method to collect gas in an experiment is better if the gas produced is soluble. 

[~ Miss Relina ~]

Can anyone tell me why using a gas syringe method to collect gas in an experiment is better if the gas produced is soluble. 

because using the other method ''  collecting gas under measuring cylinder fillde with water'' won't be suitable as the gas is soluble so will dissolve in water and won't be collected

hope you got it 

[The Golden Girl =D]

A2 Q on the way !!

This Q is about the rate of reaction Between 2-bromo-2-methylpropanone and sodium hydroxide. 

Describe how the concentration of Hydroxide ions could be determined during the reaction.


My friend suggested Taking samples during the reaction and Doing titration to it , I just feel that that doesn't make sense at all or at least isn't doable o__O 

Thanks in Advance =]

[Amelia]

A2 Q on the way !!

This Q is about the rate of reaction Between 2-bromo-2-methylpropanone and sodium hydroxide. 

Describe how the concentration of Hydroxide ions could be determined during the reaction.


My friend suggested Taking samples during the reaction and Doing titration to it , I just feel that that doesn't make sense at all or at least isn't doable o__O 

Thanks in Advance =]

I wonder if this  gives the idea.

[~ Miss Relina ~]

A2 Q on the way !!

This Q is about the rate of reaction Between 2-bromo-2-methylpropanone and sodium hydroxide.  

Describe how the concentration of Hydroxide ions could be determined during the reaction.


My friend suggested Taking samples during the reaction and Doing titration to it , I just feel that that doesn't make sense at all or at least isn't doable o__O  

Thanks in Advance =]

you could use Ph change  as NaOH concentration change

[The Golden Girl =D]

For the record, It's an indirect way so we have to actually work out the concentration (by calculations).

Thanks =]

[~ Miss Relina ~]

For the record, It's an indirect way so we have to actually work out the concentration (by calculations).

Thanks =]

ur welcome
but you mean we have to calculate  final concentration and that can be done by finding any of the reactants concentration and use equation to get the no. of moles of the NaOH reacted then by the known initial conc which gives the initial no.of moles we have { initial no.of moles - reacted no. of moles = unreacted/left no.of moles} this is used to get the conc of the NaOH left 
but the way of  keeping track of the conc of NaOH is using Ph ...etc

that's what u meant right  

[The Golden Girl =D]

Never mind, I got the idea , Thanks =]

[~ Miss Relina ~]

Never mind, I got the idea , Thanks =]

I also expected that you would be lost in last post sorry for too long explaination I tried to make the idea reach you but it seems that you may get confused   

[The Golden Girl =D]

My brain isn't functioning well since I've been studying for tomorrow's Quiz for many hours, so excuse me =]

[~ Miss Relina ~]

My brain isn't functioning well since I've been studying for tomorrow's Quiz for many hours, so excuse me =]

then good luck

[The Golden Girl =D]

Thanks =]