RelativeResourceManager(8) - 7.5 8.0 8.5 Strongly acid...

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8 of 17 pH and pOH are related to the normality of acids and bases. The table below gives normalities of pH and pOH units. pH Acid (normality of H) Alkaline (normality of OH) pOH 0 1.0 0.000,000,000,000,01 14 1 0.1 0.000,000,000,000,1 13 2 0.01 0.000,000,000,001 12 3 0.001 0.000,000,000,01 11 4 0.0001 0.000,000,000,1 10 5 0.00001 0.000,000,001 9 6 0.000001 0.000,000,01 8 7 0.000,000,1 0.000,000,1 7 8 0.000,000,01 0.000001 6 9 0.000,000,001 0.00001 5 10 0.000,000,000,1 0.0001 4 11 0.000,000,000,01 0.001 3 12 0.000,000,000,001 0.01 2 13 0.000,000,000,000,1 0.1 1 14 0.000,000,000,000,01 1.0 0 The following is the range of pH commonly encountered in soils in the U.S. pH 5.5 6.0 6.5 7.0
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Unformatted text preview: 7.5 8.0 8.5 Strongly acid Medium acid Slightly acid Very slightly acid Very slightly alkaline Slightly alkaline Medium alkaline Strongly alkaline B. Exponents and Logarithms Since calculation of pH involved the use of logarithms the following is a refresher on exponents and logarithms: y * y * y = y 3 ; A A 1 = A A 1 = A 1 A 1 = 2 A 1 0.1 = 10 1 = 10-1 ; 0.01 = 100 1 = 2 10 1 = 10-2 (10 N )* (10 M ) = 10 N+M In general, we can always write any number X as another number A raised to a power y, where y need not and usually is not an integral (whole steps). That is, X = A y . The exponent y is called the logarithm of X to the base A and is written as follows: log A x = y...
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This note was uploaded on 06/21/2011 for the course NRES 201 taught by Professor Olson,k during the Spring '08 term at University of Illinois, Urbana Champaign.

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