A 0050 M Solution of Ammonium Chloride Is Prepared

Multiple Choice

A 0.050 M solution of ammonium chloride is prepared. Find the H₃O⁺ concentration:
( K _b for ammonia = 1.8×10 ^{- 5})

A) 5.3×10 ^{- 6} M
B) 5.3×10 ^{- 4} M
C) 2.0×10 ^{- 13} M
D) 9.5×10 ^{- 4} M
E) none of these