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Unformatted text preview: Remember the following when converting between molarity and normality. M = liter moles B. Normal (this takes into account the charge of a substance). 1 equivalent weight, grams = molecular or atomic wt. (grams) valence or charges per formula milliequivalent weight, grams = equivalent weight (grams) 1000 N = equivalents liter Examples (a) Example of the determination of equivalent weight (the mass of a substance that contains 6.023 x 10 23 positive or negative charges). Given: Na, Ca, Na 2 , SO 4 , and Al 2 (SO 4 ) 3 18H 2 O, Determine: the equivalent weight of each. 1) Na; atomic wt. = 23 g/mole, valence = 1 equivalent wt. = 23 = 23 g/eq. 1 2) Ca; atomic wt. = 40 g/mole, valence = 2 equivalent wt. = 40 = 20 g/eq. 2...
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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.
- Spring '08