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.
Eight Common Oral Infections. Oral bacteria can cause viruses, tooth decay, gum disease and other common mouth infections in both children and adults. Some of these infections are preventable with good oral hygiene, and many only last a few days â especially those that are common in childhood. Other dental conditions, however, are more advanced and can stick around much longer.