Chem Lab C

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Chem Lab C

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Re: Chem Lab C

Post by zerasaw »

Will the indicator for the titration always be the ubiquitious phenolphthalein or is it at the discretion of the supervisor?
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Re: Chem Lab C

Post by EastStroudsburg13 »

It's at the discretion of the supervisor, but I think most times chances are it'll be phenolphthalein, because that'll be what supervisors are most familiar with. They might also give you a choice of indicators, I think I had that happen to me at least once.
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Re: Chem Lab C

Post by zerasaw »

Thanks. Is the "titration race" on for this year or is it just a test with practical stations?
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Re: Chem Lab C

Post by Crazy Puny Man »

Titration race?

Is this referring to last year's nationals?
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Re: Chem Lab C

Post by zerasaw »

I'm not sure.
I just didn't know what aspects of stoichiometry will be tested on or not. I know titrations will be asked in the practical section.
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Re: Chem Lab C

Post by Crazy Puny Man »

What makes it a race though?

I heard last year's nationals test was absolutely ridiculously long; I think my teammates said they had to do like 4 or 5 titrations (or was it 8?) at a 6 minute lab station. All the other stations asked for an insane amount of problems done in a ridiculously short time limit.

Is that where you got the "race" part of it from?

EDIT: nvm, it's at the top of the thread :oops:
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Re: Chem Lab C

Post by zerasaw »

8 titration procedures is not hard if you do calculations beforehand, but 8 titrations total (including prepping) is insane...
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Re: Chem Lab C

Post by thsom »

What sets apart teams in Chem Lab? I'd imagine about 80% of teams have students in or who have already taken AP Chemistry. Therefore, how do teams fall or rise as it's really simple to do stoich and understand equilibrium concepts. I feel as if many teams will do about the same. Is it the labs? If so, how are labs graded and what kind of labs are done other than titrations?
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Re: Chem Lab C

Post by zerasaw »

I've never done this event (I'm currently in AP Chem) but I think that the stoich calculations will probably use insane things such as complexes, free radicals, obscure, massive hydrocarbons, and such.
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