## pH, pOH, [H^{+}] and [OH^{-}]

This page is a drill and practice exercise in basic pH calculations. When
you press "New Problem" a value will appear in one of the windows. You must
properly fill in the other three windows. Pressing "Submit" checks your answer and
returns the result in the second table. If you get a problem incorrect, you
should retry it until it is correct. Use the "e" notation to enter numbers
in scientific notation:

#### Hints

- Use
**TAB** to move between cells
- Use "e" notation for scientific notation: 1.2*10
^{-3} would be entered 1.2e-3
- When your answers are checked, any incorrect values will be cleared so that they can be corrected.
- If you miss a problem three times, pressing "Show Answer" will display a complete solution.