ocr: 10 This material prepared by Sanjay Shah. Use at your own discretion. 37.-Nitrous acid, HNO2, has an:ionization constant Ka. = 4.0 X 10-4. The pH of 0.25.M HNO2 is: 2.00 b) 2.30 c) 2.70 d) 3.70 none of these 38. In a solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution, the pH is observed to be 1.35. The Ka for propionic acid (HC3H502) is: (a))2.0 X 10-2 by3.6 X 10-2 c)4.5 X 10-2 d) 5.0 X 10-12 - none of these 39. What is the [H+] in a solution that is 0.10 M in NaF and 0.20 in HF (Ka = 7.2 X 10-4)? a) 0.20 M A b) 7.0 X 10-3 10-4 M M C)1.4 X d ...
