Overview. Bacterial pneumonia is an infection in one or both lungs. The bacteria cause the lungâs air sacs (alveoli) to become inflamed and engorged with pus, fluid, and cellular debris. This often impairs the bodyâs ability to exchange oxygen and carbon dioxide.he most common symptoms of bacterial pneumonia are: 1  cough with yellow, green, or blood-tinged mucus. 2  chest pain that worsens when coughing or breathing. 3  sudden onset of chills. 4  fever of 102 degrees or above (lower than 102 in older persons). 5  headache. 6  muscle pain. 7  breathlessness or rapid breathing. 8  lethargy.
In the Lewis model, a base is an electron pair donor. In water, by altering the autoionization equilibrium, bases yield solutions in which the hydrogen ion activity is lower than it is in pure water, i.e., the water has a pH higher than 7.0 at standard conditions.
Al(OH) 3, for example, acts as an acid when it reacts with a base. Conversely, it acts as a base when it reacts with an acid. The Br nsted Definition of Acids and Bases. The Brnsted, or Brnsted-Lowry, model is based on a simple assumption: Acids donate H ions to another ion or molecule, which acts as a base.rrhenius bases include ionic compounds that contain the OH-ion, such as NaOH, KOH, and Ca(OH) 2. This theory explains why acids have similar properties: The characteristic properties of acids result from the presence of the H + ion generated when an acid dissolves in water.