A Tablet of a Common Over-The-Counter Drug Contains 200

question 126

Multiple Choice

A tablet of a common over-the-counter drug contains 200.mg of caffeine (C₈H₁₀N₄O₂) .What is the pH of the solution resulting from the dissolution of two of these tablets in 225.mL of water? (For caffeine, K_b = 4.1 × 10^-4.)

• A)2.76
• B)7.67
• C)10.96
• D)6.33
• E)11.24

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Definitions:

Original Data

The initial dataset collected or received before any processing, manipulation, or analysis has been done.

Independent Events

Events whose occurrence or outcome is not influenced by the occurrence or outcome of another event.

P(A and B)

The probability that both events A and B occur.

P(A)

The probability of event A occurring, an elementary concept in probability and statistics.