What Is the Solution PH When 0 $\times$ 10^-5)and 0

Multiple Choice

What is the solution pH when 0.10 mol of H⁺ is added to a 2.0-liter buffered solution created from 0.45 M NH₃ (K_b = 1.8 $\times$ 10^-5) and 0.26 M NH₄F.

A) 8.07
B) 4.63
C) 9.37
D) 10.34
E) 4.85