Hi,
Ex: calculate -log(15.32)
You can also try 15.32 [LOG] (-) [=]. Try to veriufy it on your calculator.
Here is a picture of the change sign
Hope it helps
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 :)
SOURCE: What button do I use to find negative log on my
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
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
2nd
LOG
1/x
Answer 0.001
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.
SOURCE: TI-30XA
Use the inverse log key sequences "2nd LN" or "2nd LOG" depending on whether you are using natural logs or logs to base 10
SOURCE: natural logarithm with TI-30XA calculator
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.
] [=] . This should make the 4.80 negative.
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