Question

In: Chemistry

Answer all parts below, which are related to each other. A. Ammonia (NH3(aq)) is a common...

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.

Solutions

Expert Solution

A; At equivalence point only NH4+ will be present.

Thus pH is 4.64 at equivalence point

B:

queen_honey_blossom answered 3 years ago
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