sampleexam1pt2 - reagents(with grams or volumes reported...

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7 18. (9 pts) You have the following reagents on hand: Solids Solutions sodium acetate (pK b = 9.26; 82.0 g/mol) 1.0 M HCl Tris (pK b = 5.92; 121 g/mol) 1.0 M NaOH NaH 2 PO 4 (pK a =7.31; 120 g/mol) NaHCO 3 (pK a = 10.25; 61.0 g/mol) a) What combinations of reagents would you use to prepare the best possible buffer at each of the following pH values? (No amounts are necessary.) i) 5.00 ii) 8.30 b) Describe how you would prepare 1.0 L of a 0.1 M buffer at pH 8.30, using only these
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Unformatted text preview: reagents (with grams or volumes reported for each reagent). Discussion Section Assessment (as of September 30, 2005) Below Average Average Above Average infrequently contributes in a sometimes contributes in a always contributes in a positive and meaningful way positive and meaningful way positive and meaningful way...
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