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MM filters will get rid of ANY particles that are larger than their pore size. This includes dissolved ions.

No. -Define Haber process (+ equation) + exothermic reaction -Le chateliers principle AND how it relates (high pressure, low temp). -Rate of reaction, how its related to low temp. -Balance of these must be used, as well as Fe catalyst. -EVALUATE importance of monitoring and management...

No, ur interpreting it incorrectly. It means there are Y polymer molecules with molecular weight X. (Y and X mean the corresponding axes).

definitely D... first u use apparatus S to filter out any suspended solids, then u evaporate to dryness with Q, then u weigh what is left over. success one are retards.

Different polymer chain lengths.

Ok what are you guys writing about? I'm saying: -Similar properties to polypropylene -Biodegradable -Produced by bacterium like Alcaligenes eutrophus. -Fed nutrients so they multiply rapidy, then one nutrient taken away. -bacteria stops growing and begins making PHB for energy storage...

U mean cathode rite? Just that typo makes a bit of a difference...

Is anyone else doing PHB (poly(beta-hydroxybutanoate) ?

The copper is now being reduced Ie Cu(2+) + 2e --> Cu and is depositing on the copper cathode. This means the generator must be pumping electrons into the copper.

Nah not what I mean... Say u electrolysise CuSO4. U get copper on the cathode but u get oxygen gas at the anode because sulfate is too stable to be oxidised. and theres more that we have to remember, I think the syllabus calls them 'selected solutions' but it doesnt actually tell us...

Pedantic? :)

Technically it's: H2SO4 + H2O <---> HSO4(-) + H3O(+) and HSO4(-) + H2O <----> SO4(2-) + H3O(+) aint it?

H2SO4 is diprotic so times the H+ concentration by 2

How many of us know how to predict what will happen at the anode and the cathode during electrolysis with inert electrodes? Is there any easy way of remembering it?

You would assume that the actual bonding would be to electrostatic forces right? Especially in the case of ionic bonding...

Yeah, so in summary: Valid = experiment answers question Reliable = experiment can be repeated X number of times with very similar results ?

Oi just remember that: Bacteria reduce sulfate (SO4(2-) + 5H2O + 8e -> HS(-) + 9OH(-) And Iron oxidises 4Fe --> 4Fe(2+) + 8e and then add them together :) that way u can work ur way thru the process in the exam rather than give them one equation and go yeah something happens.

OK I have: Anaerobic bacteria reduce sulfate ions: SO4(2-) + 5H2O + 8e ----> HS(-) + 9OH(-) and the oxidation of iron (*4): 4Fe ---> 4Fe(2+) + 8e Addition of the equations, taking note that one Fe(2+) reacts with the HS-: 4Fe + SO4(2-) + 5H2O + 8e ---> FeS + 3Fe(OH)2 + H2O +...

Theres a lot of people asking for this now so i figure why not My final marks are like: Maths 2U: 86%, 7/80 Maths 3U: ~70% (dunno), (around middle of class of 15) Physics: 89%, 1/40 Chemistry: 83%, 4/30 Legal Studies: 80%, 7/40 English Adv: 68%, 30/90 (hahahahaha i hate english)...

Hey people! I'm just wondering what the big 5 markers and the bigger ones were for the CSSA and NEAP... I wanna just get a general idea on what they are asking this year. Anyways, thanks!