pH is a logarithmic measure of the hydrogen ion concentration of an aqueous solution: pH = -log[H+] where log is the base 10 logarithm and [H+] is the hydrogen ion concentration in moles per liter. pH describes how acidic or basic an aqueous solution is, where a pH below 7 is acidic and a pH greater than 7 is basic. pH of 7 is considered neutral (e.g., pure water). Typically, values of pH range from 0 to 14, although very strong acids may have a negative pH, while very strong bases may have a pH exceeding 14. The term pH was first described by Danish biochemist SÃ¸ren Peter Lauritz SÃ¸rensen in 1909. pH is an abbreviation for power of hydrogen where p is short for the German word for power, potenz and H is the element symbol for hydrogen. Why pH Measurements Are Important
The 3 types of symbiotic relationships are mutualism, commensalism, and parasitism. What makes these three relationships similar is that they involve the close and often long- â¦ term interaction between different biological species.
- a symbiotic relationship that benefits both organisms involved. C-Commensalism. - a symbiotic relationship that benefits one organism and the other is not helped nor harmed. P-Parasitism-. a symbiotic relationship that benefits one organism and the other is harmed.