### p value

When chemical analysis is carried out, it turns out that the concentrations of many solutions are far below 1M, for example:
10^{-3}M 3.10^{-9}M etc.

To apply in an easy way such small concentrations, in chemistry we use the so called p values.
Mathematically this means: -log;
sign and number 10 is simply left out:

p..... = 3 means: [.....] = 10^{-3} mol/liter

It also happens that the substance itself is abbreviated; charges are left out, sometimes even more:

- pH = 5 means: [H
_{3}O^{+}] = 10^{-5} mol/l
- pOH = 7 means: [OH
^{-}] = 10^{-7} mol/liter

Now try (if possible) to execute action task A, to be found at the end of this module.