A monoprotic weak acid is present at an initial concentration of 0.150 M
CHEMISTRY · Single correct · AP · Chemistry · Acids and Bases · Acids and Bases
Problem
A monoprotic weak acid is present at an initial concentration of 0.150 M. The measured pH of the solution at 25 °C is 2.85. What is the acid-dissociation constant, Ka, of the acid?
(a) 9.4×10−6
(b) 1.3×10−4
(c) 1.3×10−5
(d) 9.5×10−3