1. Ammonia, NHs, is a weak base with a K, value of 1.8x10-s Part A what is the pH of a 9 00-10-2 Mammonia solution? Express your answer numerically to two decimal places pH 11.1 Part B What is the percent ionization of ammonia at this concentration? å¹ 0B5 g of hydrogen chioride aich is dissolved in water to make 6 0 the pH of the resulting hydrochloric acid solution? A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actaal chemical formula must remain top secret. The company is interested in the drug's Ka value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries. To find the pKa of X-281, you prepare a 0 095 M test solution of X. 281 at 25.0 C. The pH of the solution is determined to be 3.00. What is the pKa of X 281? 2. solution What is 3. 4. If Kb for NX3 is 5.5x10-6, what is the the pKa for the following reaction? 5. Calculate [HsO-] of the tollowing pslprotic acld solution:0 135 AMHCHso