AS Chemistry P2 Prep.

[angelgirl:)]

so wht do i write.... heat or reflux...?

we will ask teacher tomo..remind me?

 

[saudha]

wht is the ans of SO2+HCl

 

[Pals_1010]

What is the use of the heat exchanger in the Haber Process in the N02 marking scheme?

 

[angelgirl:)]

wht is the ans of SO2+HCl

how come both acid rect together?

 

[angelicsuccubus]

hi
when changing nitriles into carboxylic acids it should be hat only not with reflux right?? why in the marckschemes its reflux?

saudha angelgirl:)
I have it as heat under reflux in my notes, so I'd say stick to that.

 

[angelgirl:)]

What is the use of the heat exchanger in the Haber Process in the N02 marking scheme?

to make the gases hot...

 

[angelgirl:)]

saudha angelgirl:)
I have it as heat under reflux in my notes, so I'd say stick to that.

ya ewrite reflux

 

[saudha]

saudha angelgirl:)
I have it as heat under reflux in my notes, so I'd say stick to that.

perrrrfect thxx

 

[Amaryllis]

wht is the ans of SO2+HCl

for NACL+conc. H2SO4 its heat under reflux right?
PI3 is heat
and pcl5 is Room temp .....im i right??
i mean the halogenoalkanes

 

[saudha]

for NACL+conc. H2SO4 its heat under reflux right?
PI3 is heat
and pcl5 is Room temp .....im i right??

maybe.... i reaallly hav no idea

 

[saudha]

for NACL+conc. H2SO4 its heat under reflux right?
PI3 is heat
and pcl5 is Room temp .....im i right??
i mean the halogenoalkanes

yahh right......

 

[Amaryllis]

yahh right......

yaaay

 

[aaditya menon]

Did I just read reflux means really strong heating? Guyz, no!

Reflux is when you have to distill something off before the reaction proceeds. FOr instance, while oxidizing an alcohol to get an aldehyde and not an acid,
one should reflux the aldehyde as it is formed so that it doesn't stay in there with the agent and get oxidized further.
Similarly, here, for conversion of nitriles to -COOH acids, you gotta reflux the acid as it's formed!

 

[user]

Did I just read reflux means really strong heating? Guyz, no!

Reflux is when you have to distill something off before the reaction proceeds. FOr instance, while oxidizing an alcohol to get an aldehyde and not an acid,
one should reflux the aldehyde as it is formed so that it doesn't stay in there with the agent and get oxidized further.
Similarly, here, for conversion of nitriles to -COOH acids, you gotta reflux the acid as it's formed!

sorry
i m probably mistaken..thnx 4 the info...never knew that...

 

[Almostdoctor]

What r the characteristics of chiral carbon? As in what makes a carbon a chiral carbon?

 

[Saad (سعد)]

2 lone pairs

Sulfur dioxide has two bond pairs, one lone pair and one dative covalent bond.

2 bond pairs and 1 lone pair; that makes it bent at 117 degrees... I think.

 

[user]

What r the characteristics of chiral carbon? As in what makes a carbon a chiral carbon?

should have 4 bonds...and all 4 groups attached SHOULD be different

 

[Almostdoctor]

should have 4 bonds...and all 4 groups attached SHOULD be different

There's something else as well... :s

 

[angelgirl:)]

saudha angelgirl:)
I have it as heat under reflux in my notes, so I'd say stick to that.

ya ....even me i have in my note the same thing...

 

[Gémeaux]

Did I just read reflux means really strong heating? Guyz, no!

Reflux is when you have to distill something off before the reaction proceeds. FOr instance, while oxidizing an alcohol to get an aldehyde and not an acid,
one should reflux the aldehyde as it is formed so that it doesn't stay in there with the agent and get oxidized further.
Similarly, here, for conversion of nitriles to -COOH acids, you gotta reflux the acid as it's formed!

sorry but either u understood it wrong or u wrote it wrong. reflux, i simple words means heating under pressure. for oxidation of alcohol, reflux produces ann ACID!! for aldehyde u have to heat it and distill off the product as soon as it is formed.
this is the definition:

To boil (a liquid) in a vessel attached to a condenser so that the vapors continuously condense for reboiling.