SigFigs

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Hamilton Oh Dis 3L
Posts: 30
Joined: Fri Sep 25, 2015 3:00 am

SigFigs

Postby Hamilton Oh Dis 3L » Thu Dec 03, 2015 9:38 pm

Is pH and pOH always given to the hundredths place?

Chem_Mod
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Joined: Thu Aug 04, 2011 1:53 pm
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Re: SigFigs

Postby Chem_Mod » Thu Dec 03, 2015 9:40 pm

No. You must follow the unique significant figures rules for logarithms when working with pH, pOH, etc.

When you take the log of number with N significant figures, the result will have N decimal places.

If you take the antilog of a number with N decimal places, your result will have N significant figures.

Jacqueline Lee
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Re: SigFigs

Postby Jacqueline Lee » Fri Dec 04, 2015 3:54 pm

Before you take the log of a number, does the number have to equal to the number of Sig figs at the beginning of the problem(what was given) in order for the final value to be correct?


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