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

question 4

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:

Contra Asset

An account on a company's balance sheet that offsets against an asset account on the same balance sheet.

Miscellaneous Revenue

Income from sources other than the main business activities, such as rental income or interest income.

Cash Over And Short

An account that records the discrepancies between the actual cash received and the expected amount.

Credit Balance

An accounting term that signifies a positive balance in a liability, revenue, or equity account, which increases on the credit side and decreases on the debit side.