An Introduction to Water Quality

Water is a limited and precious resource on our planet. No living thing – plant, animal or human – can survive without a clean supply. Project WET’s “Drop in the Bucket” activity is an excellent way to illustrate the relative scarcity of fresh water on Earth. View the “Drop in the Bucket” lesson plan online, […]

Conductivity: Pure Water + Sulfuric Acid

In this video, Dr. David Hobbs observes the conductivity of pure water plus sulfuric acid. Right-click or ctrl-click this link to download.

Conductivity: Pure Water + Acetic Acid

In this video, Dr. David Hobbs observes the conductivity of pure water plus acetic acid. Right-click or ctrl-click this link to download.

Conductivity: Pure Water + NaCl

In these short videos, Dr. David Hobbs demonstrates the conductive properties of water. Conductivity refers to the amount of dissolved solids present in an aqueous solution, allowing it to conduct electricity. In this first video, Dr. Hobbs observes changes in conductivity when salt (sodium chloride, NaCl) is added to pure, or deionized, water. Right-click or […]