VCE Chemistry 2010 Unit 3 Exam Suggested Solutions

[VeryCrazyEdu.]

is 6.b. suppose to be 55 degrees?? i thought it was 35 but if u look at the key carefullly...

[10weid]

and also MAO ur instilling fear in people by writing wrong answers.
the temp of maximal enzymic activity is deifinitely 55 degrees.
and 1.5 litres is the answee to the volume of methanol
and i'm 99% sure u didnt need to include states in the mass spec quesiton.. for one mark merely showing the loss of an electron was adequate....

agree?

[curious111]

Are you sure 35 degrees is right for question 6b?

[vexx]

we were taught that concordant titres must lie within 0.02ml of each other, and if there is only two that do, then just use those two and justify "+/- 0.02ml". if this isn't right, then i'll be so upset.. hah

and people it's definitely 35 degrees for that question since it has the highest reaction there, annnnnnd i was quite sure states were needed and stated at the start of the exam. it should be known that in mass spec everything is vaporised before ionisation.

[Blakhitman]

But, 7bi is wrong, because you didn't count the C=O, it asked for ALL double bonds.

I reckon that's just silly, be retarded if we had to say 7, seriously aren't they just testing our ability to determine saturation?

[stonecold]

sig fig question wasn't as tricky as last year...

[Blakhitman]

we were taught that concordant titres must lie within 0.02ml of each other, and if there is only two that do, then just use those two and justify "+/- 0.02ml". if this isn't right, then i'll be so upset.. hah

and people it's definitely 35 degrees for that question since it has the highest reaction there, annnnnnd i was quite sure states were needed and stated at the start of the exam. it should be known that in mass spec everything is vaporised before ionisation.

That's what I did!

[Twenty10]

we were taught that concordant titres must lie within 0.02ml of each other, and if there is only two that do, then just use those two and justify "+/- 0.02ml". if this isn't right, then i'll be so upset.. hah

and people it's definitely 35 degrees for that question since it has the highest reaction there, annnnnnd i was quite sure states were needed and stated at the start of the exam. it should be known that in mass spec everything is vaporised before ionisation.

same...

That's what I did!

[Studyinghard]

its 55 degrees lol

[stonecold]

It was 55 degrees

[Studyinghard]

Also Mao, after having looked at the exam, what is your prediction of an A+ cut off?

[will74]

im pretty sure the invertase question was optimum at 55 degrees. And i've looked up invertase and its optimum temp is around 60 degrees and its optimum pH around 4.5??

[stonecold]

Also, no bunsen burner because you cant control the temp?

[vexx]

we were taught that concordant titres must lie within 0.02ml of each other, and if there is only two that do, then just use those two and justify "+/- 0.02ml". if this isn't right, then i'll be so upset.. hah

and people it's definitely 35 degrees for that question since it has the highest reaction there, annnnnnd i was quite sure states were needed and stated at the start of the exam. it should be known that in mass spec everything is vaporised before ionisation.

same...

That's what I did!

awesome. i reckon we'll get the mark.

[crayolé]

I did 3:1
It asked for the ration so it should be right hopefully

And the enzyme, isnt it's optimal temperature 55 degrees ?