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.
How bacteria sneak into your blood through your mouth. The inside of the human body is a bacteria-free zone. Bacteria are certainly within you, but they exist only in areas that have a direct channel to the outside world, such as the mouth, intestines and the surface of the skin.