Posted by John on Saturday, January 19, 2013 at 2:35pm.
I have a question about how to plug in numbers on my calculator (TI30XIIS) to get an answer. How would I put in my calculator...
ln 1.00X 102 mol/L /1.65 X 102 mol/L
to get0.501? I keep getting the wrong answer...

Chemistry/Calculus  DrBob222, Saturday, January 19, 2013 at 3:05pm
I don't know how the Ti30 looks but I suspect you're having trouble with the exponents. So don't use them until you learn how. In the meantime you can do this.
Punch in .01 and divide by .0165 (in the usual manner) then hit the ln key. That will give you 0.50078.

Chemistry/Calculus  John, Saturday, January 19, 2013 at 3:49pm
Thank you, sir. However, I stillmust be doing something wrong because I am not getting the answer. My calculator will give me an error if I do it that way. On my TI30 I punch in 2nd button, the hit Ln, then (1.00 X 102 / 1.65 X 102) and get 1.83...

Chemistry/Calculus  DrBob222, Saturday, January 19, 2013 at 6:14pm
I think you need to reverse that procedure. Punch in the numbers FIRST to get 0.606, then to the ln bit.
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