Author Topic: Edexcel CHEMISTRY DOUBTS!!!!  (Read 268122 times)

Offline The Golden Girl =D

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1410 on: September 24, 2011, 02:08:05 pm »
A2 Q!

Rates of reactions in Unit 4 =.=

I  just can't seem to figure out the Mechanisms in every Question I come across T_T  and I have a Quiz on Monday so can someone please give some links or a website that will CLEARLY explain it to me.

Muj if you can share your Notes I'd be Thankful =]

Thanks in advance =]
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Offline Romeesa-Chan

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1411 on: September 24, 2011, 02:12:19 pm »
A2 Q!

Rates of reactions in Unit 4 =.=

I  just can't seem to figure out the Mechanisms in every Question I come across T_T  and I have a Quiz on Monday so can someone please give some links or a website that will CLEARLY explain it to me.

Muj if you can share your Notes I'd be Thankful =]

Thanks in advance =]

Is it with the SN1 and SN2 mechanism ?
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1412 on: September 24, 2011, 02:13:19 pm »
Is it with the SN1 and SN2 mechanism ?

Nah it's the other Random ones/weird ones  :-\
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Offline Romeesa-Chan

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1413 on: September 24, 2011, 02:14:29 pm »
Nah it's the other Random ones/weird ones  :-\

Which page ? =S
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1414 on: September 24, 2011, 02:17:04 pm »
Which page ? =S
Hmm like A + B -> AB2

which one is supposed to be the slow step and which the fast step .... And what kind of mechanism does it have. and stuff .
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1415 on: September 24, 2011, 02:20:33 pm »
A2 Q!

Rates of reactions in Unit 4 =.=

I  just can't seem to figure out the Mechanisms in every Question I come across T_T  and I have a Quiz on Monday so can someone please give some links or a website that will CLEARLY explain it to me.

Muj if you can share your Notes I'd be Thankful =]

Thanks in advance =]

Check your box  ::)
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Offline Romeesa-Chan

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1416 on: September 24, 2011, 02:20:58 pm »
Hmm like A + B -> AB2

which one is supposed to be the slow step and which the fast step .... And what kind of mechanism does it have. and stuff .

Try this, love:

http://www.chemguide.co.uk/physical/basicrates/orders.html#top

If it's not helpful then lemme know, I shall explain it in my words.
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1417 on: September 24, 2011, 02:22:24 pm »
Try this, love:

http://www.chemguide.co.uk/physical/basicrates/orders.html#top

If it's not helpful then lemme know, I shall explain it in my words.

Thanks for the link love but it doesn't have the mechanism thing  :-\
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1418 on: September 24, 2011, 02:30:38 pm »
I'll check this link later ,I hope I get it then =]
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Offline Romeesa-Chan

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1419 on: September 24, 2011, 02:37:17 pm »
Thanks for the link love but it doesn't have the mechanism thing  :-\
I am not getting which mechanism. =/

Sn1 and Sn2 were the main ones and well. . . the book explains it alright.
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1420 on: September 24, 2011, 02:38:12 pm »
I am not getting which mechanism. =/

Sn1 and Sn2 were the main ones and well. . . the book explains it alright.

Then maybe the SN1 and SN2 ones I don't get , can u explain them for me =]
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Offline Romeesa-Chan

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1421 on: September 24, 2011, 02:42:17 pm »
Then maybe the SN1 and SN2 ones I don't get , can u explain them for me =]

Sure lovely. ;D

Gimme some time.

I will get back to you. (:
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1422 on: September 24, 2011, 05:22:02 pm »
-> Sn1 mechanism:

-Only one reactant
-Formation of primary carbocation before reacting with OH- ions therefore OH- ions do NOT appear in the rds (rate determining step).
Changing the concentration of OH- ions does not alter the rate of reaction.




-> Sn2 mechanism:

-2 reactants present
-Both OH- ions and the Halogenoalkane are present in the rds therefore concentration of both the reactants is vital



*learning how to draw the mechanisms are compulsary
 


ps - Reaction rate diagrams (for zero, first and second order reactions) will always come so make sure that you learn those as well.
« Last Edit: September 24, 2011, 05:24:50 pm by Romeesa~Chan »
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1423 on: September 24, 2011, 06:18:48 pm »
the book says what's the realtionship between the neutralisation and redox ??? any websites I would be grateful  :D
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1424 on: September 27, 2011, 03:45:20 pm »
the book says what's the realtionship between the neutralisation and redox ??? any websites I would be grateful  :D
Sorry for the late reply.

I am no quite sure, i guess we both use the same book so if you can refer to me to the Q page or anything then I can be of better help.
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