Unit 3 Questions MEGATHREAD :)

[vea]

Just to clarify, When esterification occurs which loses the OH group. Alcohol or Acid? I assume same thing goes for glycerol and fatty acids.

The carboxyl group loses the OH which is the acid.
Actually im not too sure

You were right, the carboxyl group loses the OH and the hydroxyl loses its H.

[DisaFear]

Came across on question telling me to give the semi structural formula of the triglyceride shown... how do we do that? As far as I know, I can only give the semi structural formula of glycerol... haha, but not both of them combined... =|

Why not?
Glycerol has an OH group
The fatty dudes have a carboxylic group

Add them and you get an ester

[azure]

Came across on question telling me to give the semi structural formula of the triglyceride shown... how do we do that? As far as I know, I can only give the semi structural formula of glycerol... haha, but not both of them combined... =|

Why not?
Glycerol has an OH group
The fatty dudes have a carboxylic group

Add them and you get an ester

Hrmm... what I mean is that I have trouble giving the semi structural formula... sure enough I know how to draw up the structural formula...

but hrmm..

let's say we're given glycerol + lauric acid

Would the semi structural just be: .... HOCH2CHOHCH2OH Okay already given up... don't know how to add the fatty acid into the semi structural formula.

[Greatness]

the fatty acid acts as the carboxylic acid;  so you would get something like:
CH3(CH2)15COOCH3

[DisaFear]

Which text book do you use?
There's a diagram in the Heinemann on page 179

[azure]

the fatty acid acts as the carboxylic acid;  so you would get something like:
CH3(CH2)15COOCH3

Thank you!

[azure]

Which text book do you use?
There's a diagram in the Heinemann on page 179

Thanks =D Found the page

[extcar]

denaturing enzymes will change tertiary and secondary structures? yes???

[scocliffe09]

denaturing enzymes will change tertiary and secondary structures? yes???

Yep.

[homosapiens]

1. When writing out the equation for oxidation from an alcohol to a carboxylic acid, does the H+/MnO4- go above the arrow or are they reactants?

2. Will 100M of weak acid have the same concentration as 1M of a monoprotic strong acid?

[DavidSheena]

1. When writing out the equation for oxidation from an alcohol to a carboxylic acid, does the H+/MnO4- go above the arrow or are they reactants?

2. Will 100M of weak acid have the same concentration as 1M of a monoprotic strong acid?

I'm not completely sure but hopefully someone corrects me.

1. I generally put the MnO4- or Cr2O72- on top of the arrow and the H+ on the bottom.

2. Concentration has no effect on the strength of the acid and pretty sure its the other around too. Concentration refers to the AMOUNT of acid present in the solution. Whereas the strength of an acid is it's ability to ionise in aqueous solutions or donate a proton readily. Hope that makes sense.

[banditkeith]

1. When writing out the equation for oxidation from an alcohol to a carboxylic acid, does the H+/MnO4- go above the arrow or are they reactants?

2. Will 100M of weak acid have the same concentration as 1M of a monoprotic strong acid?

I'm not completely sure but hopefully someone corrects me.

1. I generally put the MnO4- or Cr2O72- on top of the arrow and the H+ on the bottom.

2. Concentration has no effect on the strength of the acid and pretty sure its the other around too. Concentration refers to the AMOUNT of acid present in the solution. Whereas the strength of an acid is it's ability to ionise in aqueous solutions or donate a proton readily. Hope that makes sense.

That is correct. At least for 1.
I'm quite positive 2 is too

[homosapiens]

Awesome, thanks for your help guys, and good luck!