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e2ps11 - CH302 Practice Exam 2 1 If 500 ml of each of the...

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CH302 Practice Exam 2 1. If 500 ml of each of the following solutions is combined, which will not produce a buffer? a. .1 M trichloroacetic acid + .1 M sodium trichloroacetate b. .3 M trichloroacetic acid + .15 M barium hydroxide c. .3 M trichloroacetic acid + .2 M sodium hydroxide d. .2 M sodium trichloroacetate + .18 M hydrochloric acid 2. Consider the following table of acids and their pKa values. Rank these acids in order of increasing strength of their conjugate bases. Acid pKa CHOOH 3.77 CH 3 COOH 4.75 HF 3.20 a. HF < CH 3 COOH < CHOOH b. CHOOH < CH 3 COOH < HF c. CH 3 COOH < CHOOH < HF d. HF < CHOOH < CH 3 COOH 3. What is the pH of a 100 mL of a buffer solution containing .25 M formic acid and .30 M sodium formate if you add .01 mols of Ba(OH) 2 ? The pKa of formic acid is 4. 4. Consider the following titration curve of an acid, H 2 A: At the point indicated by the arrow, which species is predominant?
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A] = [HA - ]
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