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A solution initially contains methyl acetate (0.01M) and sodium hydroxide (0.01). The solution is unbuffered and both reacting species are consumed. If the rate costant for this reaction at 25 C is 1.082 liters/(mole x min), how many minutes will it take for the concentration of methyl acetate to fall to 0.0090 M? A. 92.4 B. 33.6 C. 10.3 D. 0.10

What you need to know: log x/y = log x - log y 0.191=2.303/12 times log50/C 0.191=0.191 times log50/C 1 = log50 - log c log c = log50 - 1 log c = 0.7 c = 10 exp 0.7 c = 5

The answer is 80 hours.

Does anybody know how to solve the question #13 from the blueprint? The expiration period for a reconstituted product is 20 hours at room temperature (25 C). What is the approximate expiration period for the same product stored in a refrigerator (5 C)?