(a) What are the equilibrium concentrations of NO-2 , HNO2, H+, and OH- in an aqueous solution prepared by combining 50.0 mL of 0.0500 M NaNO2 and 50.0 mL of 0.0800 M HCl? Ka = 7.2 x 10-4 for HNO2.
(b) Is the resultant solution in Part a above a buffer solution? Justify your choice.