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It wasn't that bad, like the rest of the exam it was very biased towards equations and calculations, so I loked it ^_^, and the 7 marker wasn't too bad either

I got 7.18 or something

yes, but it still establishes an equilibrium reaction that does not FULLY ionise, so it's not exactly 1, and it's an acid so it's more then 7

that's so wrong, I got: 1) B 2) C 3) B 4) D 5) B 6) A 7) C 8) C 9) D 10) C 11) A 12) B 13) C 14) D 15) A

It's both, check wiki "Styrene (also vinyl benzene, ethenylbenzene, phenethylene, cinnamene, diarex HF 77, styrolene, styrol, styropol)"

oh, well actually soda ash is Na2CO3, its not actually a base, it's a basic salt NaHCO3 would be a great one, it's only a buffer solution as just HCO3-, a solution of NaHCO3(aq) would be basic tho

perhaps soda ash, should be better?

acetate (like acetic acid) CH3COO- sodium acetate: CH3COONa ammonium chloride: NH4Cl ammonium acetate: CH3COONH4 sodium chloride: NaCl

From what I understand, thats pretty right, if a salt is fromed by: a weak acid + a strong base it gives a basic salt eg, sodium acetate a strong acid + a weak base it gives a acidic salt eg, ammonium chloride a weak acid + a weak base it gives a neutral salt eg, ammonium acetate a strong...

who? what? crying? racist?

Where was the crossing over? oh and hardest Question: locust stuff

I wrote a page each for the medicine(insulin) and animal biotech(cloning), all up I did 6 pages tho

I did the adding HCl to marble chips

pretty generic, although the 2nd question about the DNA profiles was a but odd, I'm not sure how it was worth 3 marks

aren't they memory T-cells?

I loved it, I had like 10 different points to discuss, so good

no, it's the concentration of solutes so the water will go from low concentration to high concentration to make the ratio of solute:water the same on both sides of the semipermeable membrane

Yay, go us ^_^

This one was started first

1 B 2 C 3 A 4 B 5 A 6 C 7 C 8 B 9 D 10 C 11 B 12 D 13 B 14 A 15 D Yay, they're the same, but u know, there's already a post on this