Rough Solutions for Exam

[Tonychet2]

I wrote O-H and write next to it oxygen and hydrogen.. would that be right?

that should be right, i wrote

oxygen, hydrogen (O-H)

[WhoTookMyUsername]

fml, should have read the exam
may squeeze in for low A+ if i'm lucky

[illuminati]

was it necessary to be so detailed in your response to the spectroscopic technique question. I chose AAS and simply said its interaction was that visible light is absorbed by atoms as it promotes electrons  to a higher energy level and that the amount of absorption indicated the concentration of the atoms present.

that should be fine and wotrh 2 marks

probably should have said it was metals.

With that identification of pure sample question, is HPLC acceptable?, and if not would i still at least get a mark for my explanation: run a HPLC chromatogram and if one spot appears, it's pure, if two or more spots appear it's not pure?

yeah, the fact you said spots throws it off a bit...

[joseph95]

You won't have lost marks for saying an O-H bond was present, as they are the atoms that the IR spectroscopy showed. It ain't an english exam brethren.

[victoriahh]

Does anyone know what the marking would be if you had the equations right but the balancing wrong??

[thushan]

Does anyone know what the marking would be if you had the equations right but the balancing wrong??

Balancing? 0/2 marking scheme says that you only get the states mark if you get the balancing right. sorry!!!

[BD1994]

For the Question 7a writing the lead ionic equation, can you write +2K plus on the end and clearly indicate its a spectator ion in the reaction?

[Wei]

Hi, is there anywhere I could get the chem questions cause' i couldn't remember my answer without looking at the questions.

[Phy124]

Hi, is there anywhere I could get the chem questions cause' i couldn't remember my answer without looking at the questions.

link to exam here: VCAA 2012 Chemistry Unit 3 Exam Discussion

[Geologyrocks23]

does the calibration curve have to go through the origin?