TRIS {(HOCH₂)₃CNH₂} Is One of the Most Common Buffers Used

Multiple Choice

TRIS {(HOCH₂) ₃CNH₂} is one of the most common buffers used in biochemistry.A solution is prepared by adding enough TRIS and 12 M HCl(aq) to give 1.00 L of solution with [TRIS] = 0.30 M and [TRISH⁺] = 0.60 M.What is the pH of this buffered system if the pK_b is 5.92?

A) 5.92
B) 6.22
C) 7.78
D) 8.08