Advanced higher Chemistry Investigation?

Original post by Nessie162

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Original post by emmagn

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It's a bit early to start worrying over it, you've not even got your higher results yet :tongue:

Don't do vitamin C, aspirin, paracetamol or iron tablets-they are so overdone. Try and do something different, have a browse around the internet.

As for explaining the course- unit 1 is half of a unit because the other half is your investigation-you get a certain number of class hours to dedicate to your investigation but its not nearly enough time, most of it will be done in your own time. You have to write a diary of your experiments etc and hand it in, it's marked as a nab. Unit 2 & Unit 3 are bigger because they're full units.

Anything specific you want to know just ask me.

(edited 10 years ago)

Reply 2

Original post by deedee123

It's a bit early to start worrying over it, you've not even got your higher results yet :tongue:

Don't do vitamin C, aspirin, paracetamol or iron tablets-they are so overdone. Try and do something different, have a browse around the internet.

Our teacher says they are good ones because if you keep it simple, you are more likely to do well. Therefore she recommends vitamin C and paracetamol. I haven't really gave it much thought, I'll look into it more soon!

Reply 3

Original post by CSM1996

Our teacher says they are good ones because if you keep it simple, you are more likely to do well. Therefore she recommends vitamin C and paracetamol. I haven't really gave it much thought, I'll look into it more soon!

Wine Analysis is the easiest investigation evar :wink:

Reply 4

Original post by Nessie162

2nd day of Chemistry and I already need help... :frown:

\Delta E = h \frac{\mathrm c}{\mathrm \lambda}

My teacher wrote the equation above on the board and somehow he changed it to this:

\Delta E \propto \frac{\mathrm k}{\mathrm \lambda}

How did he do it? What does the

\propto

mean and what does the

k

stand for?

Thanks

\propto

= means that the energy change is proportial to

\Delta E \propto \frac{\mathrm k}{\mathrm \lambda}

In this case the change in energy is inversely proportial to the wavelength (i.e as lambda gets bigger, the energy change gets smaller, experiment with this yourself if you wish)

Now, the k part is just simply a constant. This specific constant being h x c or plancks constant multiplied by the speed of light. They mean the same.

The most important thing you have to remember from this section is to remember this equation

\Delta E = \frac{Lhc}{\lambda}

where L is avagadro's number, h is plancks constant, c is the speed of light (note that these are all constants) and lambda is the wavelength of the wave :smile:

Reply 5

Original post by Nessie162

Thank You

Spoiler

No problem! :smile:

Spoiler

Reply 6

I'm thinking of doing the investigation "Determining the mass of iron in iron tablets". For this I would carry out a titration, but after once I got the solution that has been formed after titration would I use colorimetry to determine the mass of iron (using the calibration graph) or would the titration give me the results? Any help from anyone who has done this experiment would be great! Thank you!

Reply 7

Original post by CSM1996

I'm thinking of doing the investigation "Determining the mass of iron in iron tablets". For this I would carry out a titration, but after once I got the solution that has been formed after titration would I use colorimetry to determine the mass of iron (using the calibration graph) or would the titration give me the results? Any help from anyone who has done this experiment would be great! Thank you!

i've not done iron tablets but i did something similar. The titration will give you the results, you work it out using the average titre and your balanced equations along with the mass of the table etc. You could consider colorimetry as another method though.

Reply 8

Original post by deedee123

i've not done iron tablets but i did something similar. The titration will give you the results, you work it out using the average titre and your balanced equations along with the mass of the table etc. You could consider colorimetry as another method though.

Would it be better to do both titration and colorimetry because doing a couple of titrations doesn't seem like a lot...

Reply 9

Original post by CSM1996

Would it be better to do both titration and colorimetry because doing a couple of titrations doesn't seem like a lot...

Yeah, you should try and get 3 or 4 different methods otherwise you won't have enough to write about.

Reply 10

Original post by deedee123

Yeah, you should try and get 3 or 4 different methods otherwise you won't have enough to write about.

Hm I need to think of another method then :frown:

But thank you for your help!!

Reply 11

JTR__

My class has already chosen our investigations! I am doing Organic Unknowns, but have no idea how to prepare a method for this until I have the substances! Any ideas please?? We have to have our methods sorted by the time we get back!

Reply 12

Original post by JTR__

My class has already chosen our investigations! I am doing Organic Unknowns, but have no idea how to prepare a method for this until I have the substances! Any ideas please?? We have to have our methods sorted by the time we get back!

what exactly are you doing?

Reply 13

JTR__

Original post by deedee123

what exactly are you doing?

My teacher will provide me with two samples, one liquid, one solid, and I have to work out what they are... Apart from that, everything is up to me, and I have no clue where to start! :frown:

Reply 14

RetroBhoy

3

Original post by TheFOMaster

Wine Analysis is the easiest investigation evar :wink:

could you upload your wine analysis investigation please? i dont have the slightest clue where to begin haha.

Reply 15