Exam Suggested Solutions

[H2SO4]

Is anyone else expecting the Unit 4 exam to be ridiculously difficult, considering alot of it is old course?

[Mao]

wasnt there a double dilution for the manganese question, meaning the percentage of manganese was around 18%??? thats wat ma friends says, i think he was right, cause his teacher said the same i think!

it was actually dissolve -> take aliquot -> dilute -> take aliquot

when u take an aliqout u r takin a certain amount of mole out, hence there is a dilution and an 'aliqout dilution' that need to be taken into account, ma friend said that, the only reason i think is cause his teacher said it

can someone confirm this, my teachers friend said it and i want to knowwwwww

there is no pipette dilusion. it does not exist. [the pipette fills with the solution you are pipetting, nothing else, not extra water, nothing]

but a certain portion of the mole is being taken out, therefore, u need to x (100/20) and (1000/20) to account for this. I didnt do this though
 dissolve -> take aliquot -> dilute -> take aliquot
---- take aliqout is removing a certain proprotion of mole, calculate for this, then there was a dilution, calculate for this and an aliqout taken from the solution, so calculate for this??

concentration of a volume is the same as the concentration in a aliquot.... you are losing yourself on this one.

[Collin Li]

seriously guys do you want to challange me to a chem off?
get back to me once uve figured this out yeh?

a substance with the formula 'C5H8O' is known to be a cyclic ketone, draw all possible structural isomers, and indicate if those, if any, can exist as stereoisomers.
piece of cake

You are cocky, but unfortunately for you, it doesn't save you a mark. Nor does this bragging of knowledge outside of the course help you with VCE Chemistry. What is the point of asking a 5-year old child who has only learnt addition how to calculate 5x6 (without explaining the 'x' operation)?

[infraredismybitch]

nice try mao
but you have not fully grasped the meaning of the question
try again maybe?
p.s there's 11 answers

[Aba]

wasnt there a double dilution for the manganese question, meaning the percentage of manganese was around 18%??? thats wat ma friends says, i think he was right, cause his teacher said the same i think!

it was actually dissolve -> take aliquot -> dilute -> take aliquot

when u take an aliqout u r takin a certain amount of mole out, hence there is a dilution and an 'aliqout dilution' that need to be taken into account, ma friend said that, the only reason i think is cause his teacher said it

can someone confirm this, my teachers friend said it and i want to knowwwwww

there is no pipette dilusion. it does not exist. [the pipette fills with the solution you are pipetting, nothing else, not extra water, nothing]

but a certain portion of the mole is being taken out, therefore, u need to x (100/20) and (1000/20) to account for this. I didnt do this though
 dissolve -> take aliquot -> dilute -> take aliquot
---- take aliqout is removing a certain proprotion of mole, calculate for this, then there was a dilution, calculate for this and an aliqout taken from the solution, so calculate for this??

concentration of a volume is the same as the concentration in a aliquot.... you are losing yourself on this one.

lol, i didnt do this, it was ma friend, they scared me though, because when they took the aliqout they said a portion of the mole was being removed and that this needed to be corrected for!
!

[Mao]

nice try mao
but you have not fully grasped the meaning of the question
try again maybe?
p.s there's 11 answers

hahahah, lol

you have evaded the original contention: you lost a mark, mr i'm-so-up-myself
lol

[Mao]

wasnt there a double dilution for the manganese question, meaning the percentage of manganese was around 18%??? thats wat ma friends says, i think he was right, cause his teacher said the same i think!

it was actually dissolve -> take aliquot -> dilute -> take aliquot

when u take an aliqout u r takin a certain amount of mole out, hence there is a dilution and an 'aliqout dilution' that need to be taken into account, ma friend said that, the only reason i think is cause his teacher said it

can someone confirm this, my teachers friend said it and i want to knowwwwww

there is no pipette dilusion. it does not exist. [the pipette fills with the solution you are pipetting, nothing else, not extra water, nothing]

but a certain portion of the mole is being taken out, therefore, u need to x (100/20) and (1000/20) to account for this. I didnt do this though
 dissolve -> take aliquot -> dilute -> take aliquot
---- take aliqout is removing a certain proprotion of mole, calculate for this, then there was a dilution, calculate for this and an aliqout taken from the solution, so calculate for this??

concentration of a volume is the same as the concentration in a aliquot.... you are losing yourself on this one.

lol, i didnt do this, it was ma friend, they scared me though, because when they took the aliqout they said a portion of the mole was being removed and that this needed to be corrected for!
!

be happy that you are right then

[this is a giant misunderstanding of faulty process draw a diagram and you will see ]

[tigerlily06]

Question 5
    ii. Name the functional group on the side chain (1 mark)
  --->  hydroxy/hydroxyl, NOT alcohol


why isnt it 'carboxy'

[bucket]

Is anyone else expecting the Unit 4 exam to be ridiculously difficult, considering alot of it is old course?

YES :S
I looked at the unit four sample exam and fuck >.<
We have a lot to learn in the space of what, 3/4 months? >.<

nice try mao
but you have not fully grasped the meaning of the question
try again maybe?
p.s there's 11 answers

this is coming from someone who was positve the answer was 3-chloro 6-methylheptane   :idiot2:

news flash!
there is a possibility you made a mistake!!!
(I made my share.)

[infraredismybitch]

oh poor mao
cant answer my simple little question
ill admit i lost a mark, school boy error.
oh well, still doesnt mean u can answer my question does it?
; )

[vce01]

Question 5
    ii. Name the functional group on the side chain (1 mark)
  --->  hydroxy/hydroxyl, NOT alcohol


why isnt it 'carboxy'

i wrote amine

[Collin Li]

oh poor mao
cant answer my simple little question
ill admit i lost a mark, school boy error.
oh well, still doesnt mean u can answer my question does it?
; )

Let me repeat:

You are cocky, but unfortunately for you, it doesn't save you a mark. Nor does this bragging of knowledge outside of the course help you with VCE Chemistry. What is the point of asking a 5-year old child who has only learnt addition how to calculate 5x6 (without explaining the 'x' operation)?

[Aba]

wasnt there a double dilution for the manganese question, meaning the percentage of manganese was around 18%??? thats wat ma friends says, i think he was right, cause his teacher said the same i think!

it was actually dissolve -> take aliquot -> dilute -> take aliquot

when u take an aliqout u r takin a certain amount of mole out, hence there is a dilution and an 'aliqout dilution' that need to be taken into account, ma friend said that, the only reason i think is cause his teacher said it

can someone confirm this, my teachers friend said it and i want to knowwwwww

there is no pipette dilusion. it does not exist. [the pipette fills with the solution you are pipetting, nothing else, not extra water, nothing]

but a certain portion of the mole is being taken out, therefore, u need to x (100/20) and (1000/20) to account for this. I didnt do this though
 dissolve -> take aliquot -> dilute -> take aliquot
---- take aliqout is removing a certain proprotion of mole, calculate for this, then there was a dilution, calculate for this and an aliqout taken from the solution, so calculate for this??

concentration of a volume is the same as the concentration in a aliquot.... you are losing yourself on this one.

lol, i didnt do this, it was ma friend, they scared me though, because when they took the aliqout they said a portion of the mole was being removed and that this needed to be corrected for!
!

be happy that you are right then

[this is a giant misunderstanding of faulty process draw a diagram and you will see ]

do u have the actual question word for word??
i want to draw this diagram

[equinox]

someone needs to punch that guy.

[orsel]

the molecule is called 3-chloro,6-methylheptane!
i honestly dont think i dropped a mark!!
only coz i owned biol last year though
 nooobs

that's wrong, "infraredismybitch"

it is 5-chloro-2-methylheptane

or the less correct version

2-methyl-5-chloroheptane

pwnt

What was the specific wording of the question again? I seem to remember that it asks for "a/the systematic name" for the molecule, not the correct IUPAC nomenclature. If you go strictly by IUPAC, then ethylamine would not be accepted as a correct name and heaps of people wouldn't get the mark for that question.

But I think they'll be lenient about it, past exams have accepted ethylamine ...so...?