Chemistry Kb question need to clarify something
posted by Lori on .
the pKb for methylamine is 3.36, what is the Kb for methylamine?
Kb= 10^-pKb = 4.4x10^-4 is the answer
but HOW?? what is punched into the calculator to get 4.4 x 10^-4??
pKb = 3.36
pKb = -log Kb
3.36 = -logKb
-3.36 = log Kb
Punch in 3.36 and hit the change sign button OR punch in -3.36 directly, then hit the 10^x key. That will return 4.36515E-4 which rounds to 4.36E-4.
-3.36(log button or 10^x button)= syntax error ??
the key sequence will depend on the type of calculator that you have. If it is a VPAM or similar (like a Casio FX-83) then the sequence is something like
and the display will show
(depending on how the display is set up).
The exact key sequence will depend on the model of calculator you have.