Chemistry

Problem

A 20.0 mL sample of 0.150 M aqueous ammonia (

K_b = 1.8 \times 10^{-5}

) is titrated with 0.150 M HCl. What is the pH of the solution after 10.0 mL of the acid have been added? a) 7.00 b) 11.0 c) 9.26 d) 4.74