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, retry it until it is correct. Use the "e" notation to enter numbers
in scientific notation: 1.2*10-3 would be entered 1.2e-3. Pressing "Show Answer" will cause the correct answer to appear and you will no longer be able submit an answer for that problem.