Determine the ph of the solution that results

Question

1. Determine the pH of the solution that results when 40.0 mL of 0.100 M NH₃ is:

a. mixed in 20ml of distilled water

b. Mixed with 20 ml of 0.200mL of 0.200 M HCL solution

c. Mixed with20mL of 0.200 M NH₄CL solution

2. Determine the pH after addition of 0.00, 4.00, 37.50, 50.00and 53.00 mL of 0.1000 M HCl to a) 50mL of0.1000 M HCl solution b)50mL of 0.0750 M NaOH