pH

pH: Definition: pH is a measure of hydrogen ion concentration; a measure of the acidity or alkalinity of asolutionAqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline. A pH level of is 7.0 at 25°C is defined as ‘neutral‘ because the concentration of H3O+ equals the concentration of OH− in pure water. (taken from About.com Chemistry)

In order to begin with pH Levels we will first watch this video.

Extension: Here are some additional sites with more information about pH:

Intro to Water Analysis

Now that you have learned about  Density, Boiling Point and Solubility, you will now have a chance to apply your knowledge and skills to a Water Analysis.

To begin today, we are going to revisit what we started with in this unit…a video on Why Water?

After, I am going to have you partner(or triple) read this article about Hong Kong’s water situation.

We will then come together and brainstorm a list of potential pollutants and sources of those pollutants in water around the world. As your team does this, please list them on your sheet of paper. You will be rotating from group to group adding on to each paper.

In preparation of looking at samples of water next week, we will  conclude by watching this video on the PH of different liquids.