1) Both HC2O4− and HS− are amphoteric.
Write an equation to show how HC2O4− can act as a base with HS−acting as an acid.
Write an equation to show how HC2O4− can act as an acid with HS−acting as a base.
2) If Kb for NX3 is 1.5×10−6, what is the pOH of a 0.175 M aqueoussolution of NX3?
If Kb for NX3 is 1.5×10−6, what is the percent ionization of a0.325 M aqueous solution of NX3?
3) Caffeine (C8H10N4O2) is a weak base with a pKb of 10.4.Calculate the pH of a solution containing a caffeine concentrationof 420 mg/L .
