Just one sec...
Hey! Sign in to get help with your study questionsNew here? Join for free to post

How do you do anti log on the calculator!

Announcements Posted on
Last chance to win! Our 1984 city-break competition closes on Monday. Post now to enter. 22-07-2016
    • Thread Starter
    Offline

    ReputationRep:
    This was really annoying me, plus the fact that none of my teachers told me how to do it! But what exactly do you press on the calculator. For example:
    An acid has a pH of 3. What is the concentartion of H+ ions?
    pH=-log10[H+]
    3=-log10[H+]
    -3=log10[H+]

    The answer is [H+] = 10-3 moldm-3.

    errr my question is how?:confused:
    Offline

    ReputationRep:
    Err....that's right...

    In general your antilog function should be "shift/2nd function" and then the log button

    or if you really cant find it, just do

     10^-^p^H
    Offline

    ReputationRep:
    10^
    Offline

    ReputationRep:
    wtf is anti-log?

    If I have to calculate the concenrtation of H+ ions, I go:

    -3 = log (base 10) (H+)
    which is equal to:
    10^-3=H+
    Offline

    ReputationRep:
    Anti-log is the inverse of the log function, antilog is also known as 10^. It works the same as e^ is the inverse of the ln function.
    • Thread Starter
    Offline

    ReputationRep:
    (Original post by IChem)
    Err....that's right...

    In general your antilog function should be "shift/2nd function" and then the log button

    or if you really cant find it, just do

     10^-^p^H
    THANK YOU!!!!!! OH I COULD JUST KISS YOU! YOU DON'T UNDERSTAND FOR HOW LONG I WAS TRYING TO WORK THAT OUT FOR!
    Offline

    ReputationRep:
    Hehe, damn I'm good :p:
    Offline

    ReputationRep:
    (Original post by IChem)
    Hehe, damn I'm good :p:
    Pfft, editing after I posted the answer :hmmm:

    :p:
    Offline

    ReputationRep:
    Meh, I knew it anyway, I just added on a little extra to my post...
    Offline

    ReputationRep:
    (Original post by IChem)
    Meh, I knew it anyway, I just added on a little extra to my post...
    PLAYJEEARISM!!?!?!1

    I think I've made my point.

    Offline

    ReputationRep:
    No-one has given a precise answer - it depends on the base. Log(base 2)y = x is "anti-logged" by raising 2^x. lny = x is "anti-logged" by raising e^x.

    However, the standard on the calculator uses base 10 so I'll let you off... for now.
    Offline

    ReputationRep:
    (Original post by HCD)
    No-one has given a precise answer - it depends on the base. Log(base 2)y = x is "anti-logged" by raising 2^x. lny = x is "anti-logged" by raising e^x.

    However, the standard on the calculator uses base 10 so I'll let you off... for now.
    However, adapted to these circumstances (calculations involving pH) it will be nothing but log (base 10) :p:

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: April 25, 2008
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Poll
Bourne or Bond?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22

Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.