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Papers > Science > pH
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pH |
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THE IMPORTANCE OF pH pH is a number that specifically describes the degree of acidity or alkalinity of a solution. ... In the same way, the pH scale was developed. ... A scientist named, Sorenson, developed the needed scale and at the same time came up with the symbol pH. ... The pH is directly related to the ratio of H+ to OH-. ... The following example might help to explain how the pH scale works. ... It can be assigned a pH of 0. ... It can be assigned a pH of 14. ... This solution is assigned a pH of 1. In the same way, if the molar solution of the base sodium hydroxide is diluted by adding 1 milliliter to 9 milliliters of pure water, it would be assigned a pH of 13. It is significant to realize that with the acid, the 1/10th dilution increased the pH from 0 to 1, while the same dilution of the base reduced the pH from 14 to 13. In both cases the pH values were going toward 7. A pH of 7 is the exact middle of the scale at which we have neither acid nor base, but neutral. ... Acid pH (molar) Base pH (molar) 1. ... 0000001 It should be noticed that in the acid column the number of decimal places exactly equals the pH. Therefore a change of 1/10th or 10 times in acid concentration will make a change of 1 pH unit either up or down. |
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Title: pH
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