Chem Lab C

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Re: Chem Lab C

Post by bernard » December 2nd, 2014, 8:07 am

SWAnG wrote:
chalker wrote:
SWAnG wrote:For exponents and logarithims there is a special rule for sig figs. Are we expected to utilize this or not?
SO has an official SigFig policy on the website at: http://soinc.org/sites/default/files/up ... 2-5-12.pdf
Thanks! I'm assuming we use the multiplication/division rules for exponents and logarithms then?
Take a look at this link. It does a good job of explaining why the significant figure rules are the way they are. However, I cannot say that these rules are "official" since they are not on the Official Science Olympiad website.

Significant Figure Rules for Logarithms: When you take the log of a number with N significant figures, the result should have N decimal places. The number in front of the decimal place indicates only the order of magnitude. It is not a significant figure.

Significant Figure Rules for Exponents: When raising 10 to a power: If the power of 10 has N decimal places, the result should have N significant figures. The rule for raising e to a power is similar.
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Re: Chem Lab C

Post by SWAnG » December 3rd, 2014, 6:07 pm

I agree those are the correct ways to do them. However scioly has no policy on it other than the multiplication one... And a lot of supervisors don't know the rules.

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Re: Chem Lab C

Post by Unome » December 4th, 2014, 4:22 am

SWAnG wrote:I agree those are the correct ways to do them. However scioly has no policy on it other than the multiplication one... And a lot of supervisors don't know the rules.
So even in Division C I'm going to have to ask all the supervisors about sigfigs?
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Opinions expressed on this site are not official; the only place for official rules changes and FAQs is soinc.org.

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Re: Chem Lab C

Post by chalker » December 4th, 2014, 4:58 am

Unome wrote:
SWAnG wrote:I agree those are the correct ways to do them. However scioly has no policy on it other than the multiplication one... And a lot of supervisors don't know the rules.
So even in Division C I'm going to have to ask all the supervisors about sigfigs?

If you follow the rules above, I can't imagine a situation where you'd be penalized. So I'm not sure that you'd need to explicitly ask about it everytime, although you always are allowed to.

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Re: Chem Lab C

Post by Catie314 » December 22nd, 2014, 4:09 pm

Does anyone know of common labs that are likely to be used for this event this year?
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Re: Chem Lab C

Post by samlan16 » December 23rd, 2014, 10:37 am

Catie314 wrote:Does anyone know of common labs that are likely to be used for this event this year?
We are expecting basic rxns for stoichiometry followed by determining the rate laws for the kinetics part (which would mean varying the quantities of the reactants).
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Re: Chem Lab C

Post by Catie314 » December 27th, 2014, 7:52 pm

samlan16 wrote:
Catie314 wrote:Does anyone know of common labs that are likely to be used for this event this year?
We are expecting basic rxns for stoichiometry followed by determining the rate laws for the kinetics part (which would mean varying the quantities of the reactants).
Thank you. That was quite helpful.
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Re: Chem Lab C

Post by boomvroomshroom » February 24th, 2015, 6:17 pm

chalker wrote:
Unome wrote:
SWAnG wrote:I agree those are the correct ways to do them. However scioly has no policy on it other than the multiplication one... And a lot of supervisors don't know the rules.
So even in Division C I'm going to have to ask all the supervisors about sigfigs?

If you follow the rules above, I can't imagine a situation where you'd be penalized. So I'm not sure that you'd need to explicitly ask about it everytime, although you always are allowed to.
When in doubt, just use three lol
But if you really want to, no harm in being that annoying kid that asks all these clarification questions. Better safe than sorry, right?

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Re: Chem Lab C

Post by Gemma W » March 8th, 2015, 8:11 am

Just wondering, what kinds of things are people putting in their binders? Because as far as I can tell the event is mostly calculation, aside from some of the qualitative analysis stuff and reaction prediction....
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Re: Chem Lab C

Post by boomvroomshroom » March 10th, 2015, 2:23 pm

Gemma W wrote:Just wondering, what kinds of things are people putting in their binders? Because as far as I can tell the event is mostly calculation, aside from some of the qualitative analysis stuff and reaction prediction....
random trivia? and notes and charts too, I guess. We don't even use 90% of it half the time but oh well :)

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