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Saturday, 7 May 2011

Normality

Normality

When you need to compare solutions on the basis of concentration of specific ions or the amount of charge that the ions have, a different measure of concentration can be very useful. It is called normality.
We will deal with normality more completely in  acid-base titration.The normality of a solution is simply a multiple of the molarity of the solution. Generally, the normality of a solution is just one, two or three times the molarity. In rare cases it can be four, five, six or even seven times as much. The symbol for normality is N or N.
 CaCl2 rtarrow.gif (850 bytes) Ca2+ + 2 Cl-
1 M CaCl2 = 2 N CaCl2
 


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