Edexcel CHEMISTRY DOUBTS!!!!

[elemis]

Ok how do you name this ?
 

Is it the first one ?

[NidZ- Hero]

Is it the first one ?

no all de three are de name for the same compound.. but i wonder how do you get dat especailly de second one

[EMO123]

http://answers.yahoo.com/question/index?qid=20070705144640AAZKXFk

[The Golden Girl =D]

please guys in this exam question 6 and 14  explain why u chose each and tell me the difference
any help appreciated
http://www.xtremepapers.me/Edexcel/Advanced%20Level/Chemistry/2009%20Jan/6CH01-01-que-20090109.pdf

why ch3coch3 best solvent for alcohol(cyclohexanol) than water???
 need answers for these sssssssssssooooon 

ethanol is an inert solvent it won't interfere in the reaction it will only allow them to mix that's it, where as water acts as a neucleophile and it converts cyclohexanol into cyclohexene.

Correct me if I'm wrong.

[~ Miss Relina ~]

ethanol is an inert solvent it won't interfere in the reaction it will only allow them to mix that's it, where as water acts as a neucleophile and it converts cyclohexanol into cyclohexene.

Correct me if I'm wrong.

well i'm not sure but does alcohol gives alkene with water
well i think alcohol when dehyrated and water removed it gives alkene

[Aadeez || Zafar]

well i'm not sure but does alcohol gives alkene with water
well i think alcohol when dehyrated and water removed it gives alkene

ALCOHOL ----> ALKENES

condition : -  hot pumice (Porous ceramic surface) and Al₂O₃

[NidZ- Hero]

Hey wats de difference between an ion n a radical ? is radical just a normal atom

[elemis]

Hey wats de difference between an ion n a radical ? is radical just a normal atom

An ion is a charged species that has either lost or gained electron(s) such that it either has a deficiency or excess of electrons.

A radical is just an ordinary atom/group of atoms with an unpaired electron.

[NidZ- Hero]

thanx Ari Ben
but hey my doubts r never ending
So yeah in this propagation step in clorination of methane
Cl*+Ch4----->CH3Cl+H*
Cl*+Ch4----->HCL+Ch3*


So  why is de second reaction more likely

[elemis]

thanx Ari Ben
but hey my doubts r never ending
So yeah in this propagation step in clorination of methane
Cl*+Ch4----->CH3Cl+H*
Cl*+Ch4----->HCL+Ch3*


So  why is de second reaction more likely

The first reaction is slightly endothermic compared to the second one which is exotehrmic. Exothermic reactions result in more stable product hence the second one is more likely.

[NidZ- Hero]

The first reaction is slightly endothermic compared to the second one which is exotehrmic. Exothermic reactions result in more stable product hence the second one is more likely.

a stupid question isint dat exothermic reaction have extra energy so de are unstable in order to gt rid of de energy the react......

[elemis]

a stupid question isint dat exothermic reaction have extra energy so de are unstable in order to gt rid of de energy the react......

I'm not sure I follow. In an exothermic reaction the PRODUCTS are at a lower energy level and hence more stable then the REACTANTS.

[NidZ- Hero]

whats the colour change when you add cold potassium permanganate in an alkaline solutionn\ to alkene ?

Is it Purple -----> colourless
OR
      purple solution first becomes dark green and then produces a dark brown precipitate.

in my boook its de first one

[Deadly_king]

whats the colour change when you add cold potassium permanganate in an alkaline solutionn\ to alkene ?

Is it Purple -----> colourless
OR
      purple solution first becomes dark green and then produces a dark brown precipitate.

in my boook its de first one

It's the first one itself

When alkaline KMnO4 is added to an alkene, it causes oxidation of the alkene while itslef gets reduced.

This is why the colour change from purple to colourless represnts reduction of KMnO4.

i wonder where did you get dark green and dark brown ppt

[NidZ- Hero]

Can Some one help me wid  2009 Unit 1 21 C (iv)