Chemistry Mechanisms

FaoiSin

Does anyone have a list of the required mechanisms for Chemistry? like the Chlorination of Methane etc.

ChemHickey

YeaaahFaoiSin wrote: »

Does anyone have a list of the required mechanisms for Chemistry? like the Chlorination of Methane etc.

I don't have a definitive list but the normal ones are
methane
ethane

They can ask you propane as well i think.

also the ionic addition of
Br2
Cl2
HCl

FaoiSin

ChemHickey wrote: »

I don't have a definitive list but the normal ones are
methane
ethane

They can ask you propane as well i think.

also the ionic addition of
Br2
Cl2
HCl

Sound Methane, Ethane and Propane are pretty much the same aren't they?

ChemHickey

YeaaahFaoiSin wrote: »

ChemHickey wrote: »

I don't have a definitive list but the normal ones are
methane
ethane

They can ask you propane as well i think.

also the ionic addition of
Br2
Cl2
HCl

Sound Methane, Ethane and Propane are pretty much the same aren't they?

All the exact same. just radical's are different and the tetra x lead is different with respect to each
Methane = tetra methyl lead Pb(CH3)4
Ethane = ethyl. (C2H5)4
Propane = propyl. (C3H7)4

FaoiSin

Just checked the syllabus

Ionic addition of HCL, BR2 and CL2 to Ethene only
Monochlorination of Methane and Ethane only

They could probably ask Propane as well

Did you do the Hydration of Ethene? My teacher gave notes on this as well.

ChemHickey

YeaaahFaoiSin wrote: »

Just checked the syllabus

Ionic addition of HCL, BR2 and CL2 to Ethene only
Monochlorination of Methane and Ethane only

They could probably ask Propane as well

Did you do the Hydration of Ethene? My teacher gave notes on this as well.

Yes i think we did. it's just the reverse of the experiment isn't it?

if the syllabus says only methane and ethane only, only those two will be asked as the chief examiner for chemistry is extremely precise and careful in question setting. never have I seen a chemistry marking scheme re written or checked. or a question wrong or containing 'bad English'!

He's cautious, he is.

FaoiSin

Not sure how I feel about how definitions vary from year to year eg. Sigma bond being defined as the "end-on overlap of orbitals" as opposed to "head-on" which is the definition from the book

ChemHickey

YeaaahFaoiSin wrote: »

Not sure how I feel about how definitions vary from year to year eg. Sigma bond being defined as the "end-on overlap of orbitals" as opposed to "head-on" which is the definition from the book

I'd stick with head on overlap, it's in the book and he'd have to accept it.

To be certain, you could say that a sigma bond is the head-on/end-on overlap of two atomic orbitals.

Just draw a little diagram if unsure... you'll never go wrong with little diagrams! :L

FaoiSin

ChemHickey wrote: »

I'd stick with head on overlap, it's in the book and he'd have to accept it.

To be certain, you could say that a sigma bond is the head-on/end-on overlap of two atomic orbitals.

Just draw a little diagram if unsure... you'll never go wrong with little diagrams! :L

Yeah I'll probably write both :P Think it was 2009 it only said end-on in the scheme. Yeah diagrams are awesome

Copper_pipe

how do you do the HCL mechanism

ray2012

I hate the mechanisms .. I don't understand them one bit hence I find learning off the method/equations impossible.