Question about Casio FX-115ES Scientific Calculator
For natural antilogarithm use the e^x (SHIFT ln).
For common antilogarithm use the 10^x (SHIFT log).
In either case the antilog is the shifted function of the log key.
Posted on Sep 12, 2010
Testimonial: "thanks that did it !!!!!!!"
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
If I understand you correctly, the inverse of the log operation is exponentiation. So if your log = x, the inverse is 10 raised to the x power. On most TI calculators this is on the same key as the log function.
Posted on Jun 13, 2008
Press "2nd LN" which gives you the exponential (inverse natural log) of 7.41 = 1652.426....
Pressing LN will give you back 7.41
Same procedure to use logs to base 10, use LOG and 2nd LOG
Posted on Dec 31, 2008
SOURCE: antilog in chemistry problem
pH is minus (log to base 10) of the hydrogen ion activity of an aqueous solution, or (log to base 10) of (1/hydrogen ion activity)
To get the inverse log, i.e the hydrogen ion activity corresponding to a specified pH, simply enter the pH value and press
Posted on Jan 01, 2009
Yes look you can't enter the base in calculators it's default 10 so use:
log x base y = log x / log y
log (x*y) = log x + log y
log (x/y) = log x - log y
so instead of log 8 base 2 input log 8 / log 2 it's easy
hope you understand :)
Posted on Jul 06, 2009
Let y=10^(x) 10 to the power of x
Take the log of both tems of the equality. You get
log(y)=log[10^(x)] where I used square brackets for clarity. But from the general properties of logarithms
log(b^(a)) = a*log(b)
Applied to our expression above
But since we are using log as log in base 10, log_10(10)=1
We thus have two equivalent relations
y=10^x <----> x=log(y) The double arrow stands for equivalence.
If y is the log of x, then x is the antilog of y
Your question: With log_10 standing for logarith in base 10
pH=-log_10(c) c= concentration
Then log_10(c)=-pH the equivalence above translates as
log_10(c)=-pH is equivalent to c=10^(-pH)
The concentartion corresponding to a pH of 7.41 is
You enter it as follows
Hope it helps
Posted on Sep 07, 2009
Tips for a great answer:
Aug 18, 2014 | Casio Office Equipment & Supplies
Oct 02, 2011 | Casio FX-115ES Scientific Calculator
Sep 09, 2011 | Texas Instruments TI-30XA Calculator
Aug 13, 2011 | Casio FX-300MS Calculator
Jan 25, 2011 | Texas Instruments TI-86 Calculator
Dec 15, 2010 | Sharp ELW535 Calculator
Jul 20, 2010 | Casio FX-9750GPlus Calculator
Nov 17, 2009 | Texas Instruments TI-89 Calculator
Oct 19, 2009 | HP 33s scientific calculator Scientific...
Dec 07, 2008 | Texas Instruments TI-30XA Calculator
540 people viewed this question
Usually answered in minutes!