## Learning Outcomes

After completing this module you should be able to:

- Work with very large and very small numbers by converting between log and linear scales, using logarithms (to the base 10) and anti-logarithms.
- Use the log scale of hydrogen ion concentration (pH) to determine the acidity of a solution.
- Determine the hydrogen ion concentration of a solution from its pH.

2: There must be a better way!

3: The log is the power!

4: What about other numbers?

5: And what about SMALL numbers?

6: Your turn with other numbers

7: Antilogs

8: Measuring the power of an earthquake

9: Measuring acidity

10: Differences in acidity: Here are two problems

11: Summary