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drawing things

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Ninox:
Also on drawing. Complex ions
I know the arrangement, but by VCAA standards, can we put the charge on the actual ion and then when we box the whole thing, put the charge on as a superscript and still get the mark?

Collin Li:

--- Quote from: "Ninox" ---Also on drawing. Complex ions
I know the arrangement, but by VCAA standards, can we put the charge on the actual ion and then when we box the whole thing, put the charge on as a superscript and still get the mark?
--- End quote ---


I don't think the examiner will care a whole lot. Why? In reality there are no charges localised in the system because the ligands are actually covalent bonds. Don't listen to what I said though, if you say that, the VCAA guys will mark you wrong. You should put the overall charge outside the box.

kingmar:
According to the VCAA Assessment Report 2006:

The sketch needed to have correct orientation of ligands. The ammonias should have been more or less symmetrically around the Ni and the N atoms of the ammonia molecules, in structural form, pointing towards the Ni*; the 2+ may have been either directly on the Ni or shown as applying to the whole complex ion or in both such places.

ninwa:
I asked one of our chem teachers this yesterday actually. She said it doesn't REALLY matter, but to be on the safe side, put a charge on both the central metal cation AND outside the brackets. Then there's no way in hell they can mark you wrong (whereas if you put it only outside and they decided they were gonna be tight and wanted it inside as well, there goes your mark)

LOL at BA22's glycerol thing :P

kingmar:
I don't even put brackets. VCAA don't.

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