VCE Chemistry Question Thread

[Freddie Hg]

That was in response to the first question about hydrogen environments

Yeah,  I'll take a look and edit this post accordingly


The answer should be 10 - I even looked up the CNMR online and that showed 10

is my logic behind it being 10 sound or did i just get lucky? also thank you very much miniturtle for all the help you provided throughout the year

[minhalgill]

The answer should be 10 - I even looked up the CNMR online and that showed 10

cnmr? the questions asking about the number of hydrogen environments, not the carbon enviornments.
this is the answer theyve provided.

[Bri MT]

is my logic behind it being 10 sound or did i just get lucky? also thank you very much miniturtle for all the help you provided throughout the year

Yeah your logic was good.
No worries, and thank you for stepping in and answering question recently - every bit counts

cnmr? the questions asking about the number of hydrogen environments, not the carbon enviornments.
this is the answer theyve provided.

From your phrasing, we thought that you wanted to know the number of carbon environments (& it's possible there was another question but you were just trying to show us the molecule).

Which environments do you identify (or would guess)? 

[minhalgill]

From your phrasing, we thought that you wanted to know the number of carbon environments (& it's possible there was another question but you were just trying to show us the molecule).

Which environments do you identify (or would guess)? 

oops, sorry about the ambiguity. i was asking about the number of hydorgen environments?

[Bri MT]

oops, sorry about the ambiguity. i was asking about the number of hydorgen environments?

That's alright. I've realised that now and just want to know which hydrogen environments you could identify and which ones you struggled with so that I can help rectify any misunderstanding.      Other wise I'm not sure how I can help you with the question seeing as you have the answers

[Lear]

Hey,
Does anyone know of a good enzyme practical report they’ve seen online or perhaps in some trial exam (don’t need the exam itself just maybe the name and year) that is relevant to VCE?
I think an enzyme experimental design scenario may be possible for this year’s exam and was trying to get some practice.

[Bri MT]

Hey,
Does anyone know of a good enzyme practical report they’ve seen online or perhaps in some trial exam (don’t need the exam itself just maybe the name and year) that is relevant to VCE?
I think an enzyme experimental design scenario may be possible for this year’s exam and was trying to get some practice.

This might not be as useful do to the lack of tailored questions, but there are plenty of examples of enzyme experimental designs in VCE biology.

[fluff]

In the NHT 2017 Chem exam, mcq q30, why is D not a correct answer? (the correct answer is C).

Thank you!

[Bri MT]

In the NHT 2017 Chem exam, mcq q30, why is D not a correct answer? (the correct answer is C).

Thank you!

The question asks specifically about secondary cells.
Only fuel cells require a continous supply of reactants.

Hope this helps

[minhalgill]

That's alright. I've realised that now and just want to know which hydrogen environments you could identify and which ones you struggled with so that I can help rectify any misunderstanding.      Other wise I'm not sure how I can help you with the question seeing as you have the answers

are the hydrogens on the 2 ch3's attactched to the carbon on the most left in the same hydorgen environemnt?

the answer says theres 8 hydrogen environemts, yet im confused as to how? im counting 12?

[Bri MT]

are the hydrogens on the 2 ch3's attactched to the carbon on the most left in the same hydorgen environemnt?

Yep!

[Freddie Hg]

hydrogens are in the same environment if theyre bonded to the same carbon in the same way, right? how would we distinguish between carbon environments?

i think your counting hydrogens in the same environment. each enviroment is only counted as one regardless if it has 2 3 or 1 hydrogens in that enviroment
are and splitting indicate the amount of hydrogens in a single environment
i counted its 8 hydrogen enviroments

[minhalgill]

Yep!

the circled ones are in the same hydorgen environment? is this correct?

[Freddie Hg]

the circled ones are in the same hydorgen environment? is this correct?

no, the ones on the bottom benzene ring are the same on the top. remember they are symmetrical so dont count twice

[Bri MT]

the circled ones are in the same hydorgen environment? is this correct?

In the answers a unique hydrogen environment has been designated with *
and if 2 hydrogen environments are the same it's shown with a shape

Hope this helps