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RelativeResourceManager(5)

# RelativeResourceManager(5) - Remember the following when...

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5 of 17 H 3 PO 4 is phosphoric acid. Often there are two ternary acids containing the same elements. In such instances, the endings "ic" and "ous" are used to distinguish between them, the "ous" ending denoting the one with the lower number of oxygen atoms. Thus HNO 3 is nitric acid, and HNO 2 is nitrous acid. Some binary compounds function as acids in water solution. The combination of the prefix "hydro" and the suffix "ic" used to indicate a water solution of a binary acid. For example, a water solution of hydrogen chloride, HC1, is called hydrochloric acid. The names of salts of binary acids have the customary "ide" ending. NaOH + HC1  Na + + Cl - + H + + OH -  NaCl (sodium chloride) + H 2 O II. WEIGHTS AND CONCENTRATIONS A. Molarity and Normality Relationships
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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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