Chemistry'10 paper 3. PLEASE HELP IF YOU CAN :-[

[lulu10]

GUYS,
im going absolutely crazy :|.

How do you kno when the electrolyte is molten, aqeous or dilute.

EXAMPLE: JUNE'09 Q2. 

[Adham-amr]

if the electrolyte is molten it's used up e.g molten lead bromide Pb+ at cathode and Br- at anode
if aqueous or dilute they're both the same they have the same but extra two ions
e.g aqueous or dilute sodium chloride they have Na+ Cl- and H+ OH- from water

[princess12]

can any 1 tell me the structure of but-2-ene
reply me 

[mohit1234]

here is a pic
sorry fr the bad drawing

[Liya]

here is a pic
sorry fr the bad drawing

how about poly - but-2-ene ?

[Ivo]

how about poly - but-2-ene ?

Sorry for my appalling drawing!  

[username]

Sorry for my appalling drawing!  

hey
wont polybut-2-ene
hav the same structure as polybutene

[Ivo]

hey
wont polybut-2-ene
hav the same structure as polybutene

Nah, it would be slightly different.  This is poly(but-1-ene).

[username]

Nah, it would be slightly different.  This is poly(but-1-ene).

whoa
how can u make the diffrence???

[Ivo]

whoa
how can u make the diffrence???

Because the double bond in the monomer of but-1-ene and but-2-ene is different, so obviously the monomers for them are slightly different.

[Liya]

can someone list the name of those -ene?
if i'm not wrong, it depends on how many carbon(s) did they have, doesn't it?

and what are the difference between alkene(methene,buthene,etc), alkane (methane,buthane,etc), alcohol (methanol, etc), and others (i forget the rest)?

[mohit1234]

can someone list the name of those -ene?
if i'm not wrong, it depends on how many carbon(s) did they have, doesn't it?

and what are the difference between alkene(methene,buthene,etc), alkane (methane,buthane,etc), alcohol (methanol, etc), and others (i forget the rest)?

ethene    C2H4
propene    C3H6
butene    C4H8
pentene  C5H10
Hexene   C6H12
Septene  C7H14
Octene   C8H16

theres no methene cos CH2 cannot exist

alkenes have a double bond
alkanes dont hve a double bond

Alkanes formula - C_nH_2n+2
Alkenes formula - C_nH_2n
Alcohols formula - C_nH_2n+1OH
Carboxylic Acids formula - C_nH_2n+1COOH

Anything else??

[Liya]

thank you!!

[Helium]

NEVER MIND

[mohit1234]

No one answered lulu's question.

I'll look into it

i think someone did
look here

if the electrolyte is molten it's used up e.g molten lead bromide Pb+ at cathode and Br- at anode
if aqueous or dilute they're both the same they have the same but extra two ions
e.g aqueous or dilute sodium chloride they have Na+ Cl- and H+ OH- from water