If a Chemist Wishes to Prepare a Buffer That Will

Multiple Choice

If a chemist wishes to prepare a buffer that will be effective at a pH of 3.00 at 25°C,the best choice would be an acid component with a K_a equal to

A) 9.10 × 10^-2.
B) 9.10 × 10^-4.
C) 9.10 × 10^-6.
D) 9.10 × 10^-8.
E) 9.10 × 10^-10.