In: Chemistry
Answer all parts below, which are related to each other.
A. Ammonia (NH3(aq)) is a common component in cleaning agents. The ammonium cation (NH4+(aq)) has a Ka = 1.8 x 10-10. A chemist titrates 100.0 mL of an ammonia solution of 0.20 M concentration with 0.240 M HCl(aq). For this part, what is the pH at the equivalence point (circle the correct answer):
pH > 7.00 pH = 7.00 pH < 7.00
B. Calculate the pH when 40.0 mL of the 0.240 M HCl(aq) have been added.
A; At equivalence point only NH4+ will be present.
Thus pH is 4.64 at equivalence point
B: