The Thursday before Spring Break, the River Spies learned more about the pH of different substances and practiced some water quality testing techniques.
|Determining the pH of a common household item.|
pH stands for "the power of hydrogen". On a scale from 1-14, one represents the most acidic and fourteen represents the most basic. Pure water has a pH of 7.0. Most aquatic animals live in water with a pH range of 6.5-8.2.
We tested the following substances of varying pH: lemon juice (2), milk (6.5), water (7), baking soda (8.5), and soap (10.0).
Water Quality Testing
The River spies noted the temperature of hot and cold tap water in degrees Celsius. We then measured the amount of dissolved oxygen (% saturation) in the water samples.
Note: Cold water can hold more dissolved oxygen than hot water!
These techniques will be put to good use after Spring Break when we test the water quality at another Amazon Creek site.