Dr. Allard explains the significance of pH within aquatic and terrestrial habitats. Paul Ayers captures digital images with a Casio camera to add to his daily journal. The pH is then read by looking at the standard colors. Free oxygen is a critical factor in determining what organisms live in certain aquatic habitats. The chemical reaction that occurs causes a color change that is followed by the addition of another reagent using a precisely calibrated glass syringe which allows the user to read the amount of reagent added.
Precision is very important.
Sharon Butler has almost reached endpoint of her titration sample.