The anion in potassium sulfite, K₂SO3, is a weak base that
can accept more than one proton. (a) Write the chemical equations
for the sequential proton transfer reactions of the anion with
water. Identify the acid and the base in each reaction. (b) If 0.054
g of K₂SO3 is dissolved in water to make 200.0 mL of solution,
what amount (in moles) of potassium cations is in the solution?