Which Is the Best Choice for Preparing a Buffer with a PH

question 37

Multiple Choice

Which is the best choice for preparing a buffer with a pH of 3.5?

• A) C₅H₅O₅COOH, K_a = 4.0 × 10^-6
• B) HOC₆H₄OCOOH, K_a = 1.0 × 10^-3
• C) HBrO, K_a = 2.3 × 10^-9
• D) C₆H₄(COOH)₂, K_a = 2.9 × 10^-4
• E) CH₃COOH, K_a = 1.8 ×10^-5

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Definitions:

Interest Rate

The ratio of interest charged on a loan to the borrower, usually represented as a yearly percentage of the remaining loan amount.

Compound Interest

Calculating interest that includes both the original principal amount and all previously accumulated interest on a loan or deposit.

Simple Interest

The method of calculating interest charges based on the principal amount only, not compounding on accumulated interest.

Deposit

A sum of money placed into a bank account or given as security for a contractual obligation.