Acetaminophen, a common over-the-counter analgesic, often comes in doses of 500.0 mg and is usually taken every six hours. Calculate the half-life, t1/2, of acetaminophen in hours if 62.50 mg of acetaminophen remains in the body after 6.60 h.
Added by Michael Y.
Step 1
We are given the initial dose of acetaminophen (500.0 mg), the time after which a certain amount remains in the body (6.60 hours), and the remaining amount of acetaminophen (62.50 mg). We need to calculate the half-life of acetaminophen, which is the time it takes Show more…
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Acetaminophen, $\mathrm{HC}_{8} \mathrm{H}_{8} \mathrm{NO}_{2}(\mathrm{MM}=151.17 \mathrm{~g} / \mathrm{mol}),$ is the active ingredient in Tylenol $^{\circledast},$ a common pain reliever. A solution is made by dissolving $6.54 \mathrm{~g}$ of acetaminophen in enough water to make $250.0 \mathrm{~mL}$ of solution. The resulting solution has a pH of 5.24 . What is $K_{\mathrm{a}}$ for acetaminophen?
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