Best way to estimate log?

[razblo]

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Anyone have any tips?

 

[nze82]

Anyone have any tips?

-log n x 10^m = m - log👎

 

[Kneecoal]

if you're talking about using logs to find the pH of something, i wrote out an explanation here... if this wasn't what you're looking for, sorry!

http://forums.studentdoctor.net/showthread.php?t=635777

 

[razblo]

if you're talking about using logs to find the pH of something, i wrote out an explanation here... if this wasn't what you're looking for, sorry!

http://forums.studentdoctor.net/showthread.php?t=635777

That's exactly what I was referring to 🙂

Thank you!

 

[roguesong]

Actually there's a really easy way. For [H+] = 3 x 10-4

take the exponent and subtract by one.
then take the 3, and remember 3 becomes 5 and 5 becomes 3.

so pH = 3.5

 

[Jackson-Ave-Dental]

Just remember...

log 2 = .3
log 3 = .5
log 4 = .6
log 5 = .7
log 6 = .8
log 7 = .85
log 8 = .9
log 9 = .95