Stankovic123's chem q's

[zvezda]

Low Temperature is fine for storage, however excessive increases in temp and changes in pH will break up the 3^O structure and the bonds will re-form in different locations.

Looks like Trypsin is a special case and it does come back to function normally.  This is the reason they gave the info and told you that it "should" be kept at a low pH, thus you would say that it is to inhibit the activity while stored.

Seems like a bit of strange thing to do and will most likely confused people, but hey, its neap and thats what they do best!

Yeah neap tend to do that hahah.
Thanks.

Also, in one vcaa assessor's report, it said that, in terms of the equilibrium constant, the values 10^-4 and 10^4 are arbitrary and it seems as if the chief assessor's doesnt think that these values can determine whether the equilibrium constant is small or large. Im referring to q4 from vcaa exam 2 2012 by the way. It asked why it is justified to assum that a concentration at equilibrium is fhe same as the initial concentration.

[zvezda]

Hey,
Would malic acid have 5 or 4 hydrogen environments? Im thinking 5 but neap says 4???

[Patches]

I can't see how it wouldn't be five - do they say the two hydroxyl groups count as one?

Link with the structure for anyone else

[Lejn]

You COULD argue that the two end Carboxyl groups are distinct enough from the surrounding environments that they are the same. I wouldn't take that side, but it's the only reason for discrepancy.

[lzxnl]

I get five as well...it's not symmetrical.

[Dismounted]

Five here.

I'm guessing they miscounted - quite easy to do on that thing.