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.
The average person in good oral health has between 34 and 72 different types of bacteria in their mouth.1. Not all bacteria are bad. Many of them are find upstanding individuals within the bug world. Your mouth (and most of your insides) is teeming with bacteria and that is a healthy state of affairs. The good bacteria, of which there are many, outnumber the bad.