Example: Calculate the pH of a buffer solution that initially consists of 0.0400 moles of ammonia and 0.0250 moles of ammonium ion, after 20.0 mL of 0.75 M NaOH has been added to the buffer. Ka for ammonium ion is 5.6 x 10 -10.
There are two types of bacteria. Aerobic bacteria live with oxygen, love the company of food particles in the mouth and feed on sugar. Anaerobic bacteria exist without oxygen and feed off dead skin cells and other bacteria.
Bacteria left in your mouth by not brushing your teeth properly can cause a tooth infection. Bacteria left in your mouth could also cause an infection in your ear. Mould is a type of microorganism that grows on decaying food. It can make you ill if you eat it. 1  Page: 2  1. 3  2. 4  3. 5  4.