Where are you guys up to in class?

[minilunchbox]

We're working on Chapter 5: Redox, but I'm working through Chapter 10, all those confusing organic pathways. I also need to re-look over all the Spectroscopy stuff

^ we have just finished covering acid/base and redox.  we have our gravimetric and volumetric sac over the next two weeks.  we are going so slow!

Wow, my class is exactly where you're at, lol.

same.  spectroscopy and chromatography are really important and difficult concepts to grasp, so the clever people at heinemann decide that they will be very vague on those two topics and only give them a chapter each, whilst they waste like 6 chapters on repetitive year 11 crap.

anyone care to explain the difference between UV/Vis Spec and colourimetry?
i have no idea how they are different, unless colourimetry only uses visible light and can't select an optimal wavelength...

Ugh yes, Heinemann is so dodgy with explaining chromatography/spectroscopy. I'm reading through those chapters in the Jacaranda book and it's becoming clearer.

Pretty sure colorimetry shines the complementary colour through the solution and absorbance is read, but multiple substances in the solution could be the same colour so it's not very usefull unless the sample is completely pure. UV-VIS  chooses a frequency from a substance’s spectrum and measures the radiation absorbed at this particular frequency.

thanks for clearing that up.

so is the jacaranda book good?
maybe i should get it....

It's more simple and easier to read so it's good to reinforce concepts.

I uploaded the book a while back and it should be floating around somewhere.

[crayolé]

We did chapters 1 to 5 over the holidays, Started chromatography on first day, went on to mass spec/IF/nmr all that jazz now we're halfway through organic chem (chapter 12 in heinnemann)

[crayolé]

We're working on Chapter 5: Redox, but I'm working through Chapter 10, all those confusing organic pathways. I also need to re-look over all the Spectroscopy stuff

^ we have just finished covering acid/base and redox.  we have our gravimetric and volumetric sac over the next two weeks.  we are going so slow!

Wow, my class is exactly where you're at, lol.

same.  spectroscopy and chromatography are really important and difficult concepts to grasp, so the clever people at heinemann decide that they will be very vague on those two topics and only give them a chapter each, whilst they waste like 6 chapters on repetitive year 11 crap.

anyone care to explain the difference between UV/Vis Spec and colourimetry?
i have no idea how they are different, unless colourimetry only uses visible light and can't select an optimal wavelength...

Yeah you're right (: they both work off the exact same concept except UV vis is used for colourless substances

[stonecold]

We're working on Chapter 5: Redox, but I'm working through Chapter 10, all those confusing organic pathways. I also need to re-look over all the Spectroscopy stuff

^ we have just finished covering acid/base and redox.  we have our gravimetric and volumetric sac over the next two weeks.  we are going so slow!

Wow, my class is exactly where you're at, lol.

same.  spectroscopy and chromatography are really important and difficult concepts to grasp, so the clever people at heinemann decide that they will be very vague on those two topics and only give them a chapter each, whilst they waste like 6 chapters on repetitive year 11 crap.

anyone care to explain the difference between UV/Vis Spec and colourimetry?
i have no idea how they are different, unless colourimetry only uses visible light and can't select an optimal wavelength...

Yeah you're right (: they both work off the exact same concept except UV vis is used for colourless substances

thanks.  heinemann doesn't even mention it haha!  also, did you by any chance make a donation to douchies biology podcast lol.  he was thanking someone named tezza for making a donation...

and i'll have a look for it minilunchbox, much appreciated

[crayolé]

ROFL yeah i did LOL

which podcast was it? i havent had the chance to listen yet

[stonecold]

the glucose one.  it's the most recent.
i feel inspired haha.  that was a really cool thing to do

[crayolé]

Haha yeahh, he pays hundreds for what he does and spends so many hours for these podcasts and he's been doing it for years. He told me he doesnt care, he just wanted more people to take advantage of these podcasts and enjoy biology.

He deserved it more than anyone i reckon

Oh yeah, we did our analytical chem sac at VSECC today, got to use AAS, UV-Vis and GLC machine

[akira88]

We're doing AAS at the moment. I think we're a bit behind...

Same here....

[slothpomba]

We're not even doing AAS...

We're at the very start of chromotography

[stonecold]

Haha yeahh, he pays hundreds for what he does and spends so many hours for these podcasts and he's been doing it for years. He told me he doesnt care, he just wanted more people to take advantage of these podcasts and enjoy biology.

He deserved it more than anyone i reckon

Oh yeah, we did our analytical chem sac at VSECC today, got to use AAS, UV-Vis and GLC machine

Where did you go?  we did ours at UniMelb,  all we got to use was UV-Vis and our experiment was an epic failure.  Our sample solutions absorbance fell like 10 times above the calibration curve haha!

[crayolé]

Haha yeahh, he pays hundreds for what he does and spends so many hours for these podcasts and he's been doing it for years. He told me he doesnt care, he just wanted more people to take advantage of these podcasts and enjoy biology.

He deserved it more than anyone i reckon

Oh yeah, we did our analytical chem sac at VSECC today, got to use AAS, UV-Vis and GLC machine

Where did you go?  we did ours at UniMelb,  all we got to use was UV-Vis and our experiment was an epic failure.  Our sample solutions absorbance fell like 10 times above the calibration curve haha!

ROFL! We went to Strathmore College VSECC to do ours.

Farr our UV-Vis was completely opposite lolol. The correlation coefficient (r) of our calibration curve was like .9978  or something aha.

You got msn stone?

[slothpomba]

You guys went on a chem excursion  

[crayolé]

Yeah :/ costed us 50 bucks also :/

50 dollars to do a sac and a whole day of chem zzz

[Blakhitman]

We're going latrobe uni next week to have a look at the instruments, cost us 25 dollars....

[Nomvalt]

so...has anyone here started doing practice exams?