pH scale- (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is...
9. a position with respect to a given or specified height: The water rose to a level of 30 feet. 10. a position or plane in a graded scale of values: an average level of skill. 11. rank or status, as in a hierarchy: the top levels of government. 12. stratum or sphere: levels...
pH Definition pHis defined as the negative logarithm of H+ion concentration. Hence the meaning of the name pH is justified as the power of hydrogen. We know that all the acids and bases do not react with the same chemical compound at the same rate. Some react very vigorously, some modera...
7 Pairs of Commonly Confused Words What's the difference between 'fascism' and 'socialism'? More Commonly Misspelled Words Words You Always Have to Look Up Your vs. You're: How to Use Them Correctly Popular in Wordplay See All More Words with Remarkable Origins ...
pH Equation In 1909, Danish biochemist Søren Peter Lauritz Sørense proposed the following equation forcalculating pH: pH = -log[H+] where log is the base-10 logarithm and [H+] stands for the hydrogen ion concentration in units of moles per liter solution. The term "pH" comes from ...
The meaning of SPECIFIC GRAVITY is the ratio of the density of a substance to the density of some substance (such as pure water) taken as a standard when both densities are obtained by weighing in air. How to use specific gravity in a sentence.
Levels below ten mg/L show that the water is poorly buffered and susceptible to pH changes from natural and human-caused sources. Why Alkalinity Is Important To A Body of Water The alkalinity of your nearby body of water is important to the health and welfare of, for example, a lak...
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folate, is also common in this group. This is called nutritional anemia. One study found that post adolescent acne patients had much lower levels of folate compared to those who did not have acne. However, the study concluded, there was no link between post adolescent acne and nutritional ane...
13. an extent, measure, or degree of intensity, concentration, quantity, etc.: low levels of radiation; to increase levels of production. 14. a horizontal surface, as a floor in a building or other structure: the upper level of the bridge. 15. a device, as a spirit level, used for ...