Suggested Answers and Discussion for the 2016 VCE Chemistry Exam

[gurungi]

can anyone explain why the diprotic acid in the multiple choice (Q27) made a difference? i put B

[Biology24123]

Surely lipids is correct

[Elizawei]

Anyone reckon they'd accept Volumetric analysis for another method of determining copper II concentration? Because you can do it with iodometric analysis of copper in brass content, but i guess it's beyond the scope of VCE?

[angrypotato1]

can anyone explain why the diprotic acid in the multiple choice (Q27) made a difference? i put B

None of the other options work. If the acid was the limiting reactant, using a a diprotic acid would produce twofold more gas and therefore the mass would decrease. The rate would be faster too as there's a higher concentration of hydrogen ions

[thushan]

lipids is fine too

[nadiaaa]

Is secondary cells being cheaper than fuel cells an advantage? :S

Haha thats what i did too, Do you think we would get the mark?

[CarterGray12]

Thushan, how many could you drop for a 50? I dropped 2 marks and had number one ranking in both SACs

[Mellyboo]

Do you think they woukd have a problem with lipids (triglycerides). I put the more specific answer in brackets. I was told not to write two answers but I did it anyway?

[ciaran3105]

Could someone try and predict my SS please?
87/100 Unit 3
97/100 unit 4
~102/100 Exam

Thanks!

[Biology24123]

So was it a hard or easy exam for everyone? Harder than last years?

[Mellyboo]

So was it a hard or easy exam for everyone? Harder than last years?

I'd say it was easy except for one or two questions which were pretty tricky. All I can say is pls dear VCAA give me consequential marks for one question 🙏🏻

[alanyin1]

I felt like it was fairly moderate in terms of difficulty, similar to last year's exam.

So far I hope to only lose 1-2 marks at most

[keltingmeith]

Wow - not a lot of things to like about that exam. Also - if anyone wrote C for question 1 (multiple choice, ofc), that's actually correct! Although it looks like VCAA wanted you to put A, there's still a chance that they choose to accept C, too.

[alanyin1]

Also, can anyone explain why they the Addition* reaction of Chlorine to the Alkene was an Addition* reaction AS WELL AS a redox reaction? I thought that the UV light would split the Chlorine gas and that it would become a free radical, thus interrupting the C=C double bond and hence joining the alkene. In my understanding, I don't think that there is donation+accepting of electrons occurs with this reaction.

If anything, I thought that it'd be a covalent bond between the Cl and C

Would anybody be able to back me up or give a conclusive argument against this?

Edited: I meant addition, not substitution, my bad

[angrypotato1]

Wow - not a lot of things to like about that exam. Also - if anyone wrote C for question 1 (multiple choice, ofc), that's actually correct! Although it looks like VCAA wanted you to put A, there's still a chance that they choose to accept C, too.

how is C right? just wondering