Question about Texas Instruments TI-30XA Calculator
Ex: calculate -log(15.32)
Here is a picture of the change sign
Hope it helps
Posted on Dec 13, 2009
If you are trying to calculate the [H+] concentration from pH, you take the number 10 and raise it to the negative pH.
for example, say the pH is 11. to solve [H+] concentration, use 10^-11 and that will give you your correct answer :)
Posted on Mar 08, 2018
You compute the negative of a logarithm the same way you compute the negative of anything else. However, do you really mean the antilog (inverse logarithm)? Use 2ND [e^x] for the natural antilog, 2ND [10^x] for the common antilog.
For negative exponents, as well as negative anything, use the (-) key next to the decimal point. For your example, 1 EE (-) 6
Posted on Feb 25, 2010
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
SOURCE: Negative Exponent
1. Type in your base number
2. Press the EE button
3. Key in your exponent number.
4. Press the button on the bottom right hand side of the calculator that has both the positive and negative sign on it.
5. Press equals button.
Posted on Jul 30, 2008
I noticed that this calculator doesn't have a natural logarithm function as well. You can can always use the fact that
ln x = (log x) /log e or since log e is approximately .43429482
ln x = (log x)/.43429482. The greatest solution and it might be worth the 15 bucks or so to get a calculator with e^x and the natural logarithm function.
Posted on Mar 09, 2009
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