Give a recipe to prepare a ammonia/ammonium chloride buffer having a pH of 8.50. K_b for ammonia is 1.8 times 10^-5 Sketch the following titration curves, clearly mark the end points then tell what information can be obtained from each: a) a strong/strong base b) a weak monoprotic acid/strong base c) a weak diprotic acid/strong base A 25.00 mL of an oxalic acid (H_2 C_2 O_4) solution required 40.00 mL of a 0.09870 M solution of NaOH for complete neutralization to the phenolphtalein end point. What is the molarity of the acid what was the pH of the oxalic acid solution after addition of 10.00 mL and 30.00 mL. If the base. For H_2 C_2 O_4, K_al = 4.2 times 10^-2 and K_a2 = 6.1 times 10^-5