9.7 - Key: 7. When dissolved at 0.010 M concentration in...

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Key: 7. When dissolved at 0.010 M concentration in water, which of the following would produce a solution with pH in the range of 10-12? a. hexanoic acid (a carboxylic acid) b. methane c. an amine d. ethanol e. any organic molecule containing a carbonyl group This problem asks you to understand pH, acidity/basicity, and recognize different functional groups. pH is a measure of the acidity of a solution, and the pH scale ranges roughly from 0 to 14. Solutions that are acidic are on the low end of the scale (less than 7), and solutions that are basic are on the high end (greater than 7). A solution with a pH of 10-12 would be quite basic. A pH of 10-12 is the same as a pOH of 2-4. Since p = -log, we can use our understanding of logarithms to determine that the OH- concentration is from 0.01 M to 0.0001 M. Since the solution we are considering is .01 M, most of is molecules must increase the OH- concentration. The key to this problem then, is to determine which molecules when put in water would create a
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9.7 - Key: 7. When dissolved at 0.010 M concentration in...

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