Assignment:
Question 1. Find [H^+] in a 25 degrees Celsius solution prepared by dissolving 0.20 moles of NH4Cl in water and diluting to a volume of 400 mL, given that Kb = 1.8 x 10^-5 for NH3 (aq) at 25 degrees Celsius.
Question 2. Find [H^+] in an aqueous 25 degrees Celsius that is .20 M in HC2H3O2 and .48 M in NaC2H3O2. For HC2H3O2, Ka = 1.8 x 10^-5 at 2 degrees Celsius.
Question 3. A solution is prepared by adding HCl and HC2H3O2 to water. In the equilibrium constant.
Ka = [H^+] [C2H3O2^-]/[HC2H3O2]
Which of the following is correct
a) The H^+ in the numerator includes only the H+ that comes from the ionization of the HC2H3O2.
b) The H+ in the numerator in includes both the H+ that comes from the ionization of the HC2H3O2 and from the ionization of the HCl.
Provide complete and step by step solution for the question and show calculations and use formulas.