Calculations using exponentials and logs

Calculations using exponentials and logs

Da Man 17 Oct 2011 10:02

Wes!
I have started doing Acid/base questions and getting into pH. One issue i currently have is i have no idea how to do exponential and log calculations on a standard scientific calculator. Is you able to help?

example of a expo q is 1.0 x 10^-14/4.4 x 10^-8 kind of thing. The majority of the pH questions i am guessing are -log's as well

Hope your well and work has settled down a little!

Re: Calculations using exponentials and logs

Wes Prosser 14 Nov 2011 03:01

I'm super sorry!

After exams, I got sick :(

If you haven't worked it out yet…
Scientific calculators should have an "E" button. So, to put in 4.4 x 10^-8, you type:
4.4 [E] 8 [-]

Logs need a log button. If you have a scientific calculator, there should be a [log] and a [ln]. Use the [log] for pH calcs.

Re: Calculations using exponentials and logs

Da Man 19 Nov 2011 09:07

Would you calculate each side of the divide individually or be better off just just using brackets? Sorry its a bit basic i know but its been like 5 years >.<

Oh no man i hope you is ok! I have just been doing notes so its all good! Only 14 chapters left huzza!

Re: Calculations using exponentials and logs

Wes Prosser 30 Nov 2011 03:03

For something like 1.0 x 10^-14/4.4 x 10^-8 ?

It should be as easy as 1.0 [E] 14 [-] [ / ] 4.4 [E] 8 [-] [=]

Last edited on 30 Nov 2011 03:03 by Wes Prosser + Show more

Re: Calculations using exponentials and logs

Da Man 30 Nov 2011 11:10

Awesome thanks dude! :D