Chem Lab C

mintyfrash
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Re: Chem Lab C

Post by mintyfrash » July 16th, 2012, 4:36 pm

I'm iffy on equilibrium, on the one hand I feel like yes, it is a huge amount of information covered within the topic, on the other hand, I feel like there are fewer "random" questions which could be asked about equilibrium. Like for electrochem we had "fuel cells and common storage batteries" as a supplementary subject for states/nationals, and I mean there's so much which could be asked about that. Didn't show up on the test for nationals at all though...

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Re: Chem Lab C

Post by buzzbuzz » July 16th, 2012, 7:37 pm

Does anybody know of any good equilibrium labs that are manageable with the limited amount of time? The ones I know of wouldn't be very practical.

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Re: Chem Lab C

Post by liutony66 » July 17th, 2012, 10:35 am

So I'm not completely clear on what exactly ''equilibrium" will cover. I understand that equilibrium is when a system is essentially balanced, but in which contexts is this referring to?

I see that you say there can be a wide variety of things covered, could you give a couple more examples?

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Re: Chem Lab C

Post by 2000lby » July 17th, 2012, 11:33 am

Acid-base (weak acids/bases), solubility, vapor pressure...probably not thermo?

Maybe an equilibrium lab using FeSCN2+ or some solubility lab? I can't think of any practical non-aqueous equilibrium labs off of the top of my head...except maybe NO2 <=> N2O4
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Re: Chem Lab C

Post by butter side up » July 17th, 2012, 2:40 pm

Would doing a simply titration with, for example, NaOH and acetic acid, be an option? Then you have a form of acid/ base equilibrium. Then one could do molar calcualtions, etc.
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liutony66
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Re: Chem Lab C

Post by liutony66 » July 17th, 2012, 6:16 pm

In this competition, do they give you labs to do at the competition or do you do them before hand?

I'm guessing that doing lots of labs before hand helps anyways.

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Re: Chem Lab C

Post by Infinity Flat » July 17th, 2012, 6:54 pm

liutony66 wrote:In this competition, do they give you labs to do at the competition or do you do them before hand?

I'm guessing that doing lots of labs before hand helps anyways.
Everything is done at the competition.
Yes, practicing labs is quite helpful, but a lot of the time you'll unfortunately end up with just a written test anyway.
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