1) For sulfurous acid (H 2 SO 3 , a diprotic acid), write the equilibrium dissoc
ID: 636137 • Letter: 1
Question
1) For sulfurous acid (H2SO3, a diprotic acid), write the equilibrium dissociation reactions and the corresponding expressions for the equilibrium constants, Ka1and Ka2.
2) Write the balanced neutralization reaction for sulfurous acid reacting with sodium hydroxide.
DATA ANALYSIS 1. (Part I) Use the calibration equation from Item 1 and the absorbance reading for your unknown solution to determine [SCN-] (Part II) Compare your experimental [SCN-11, of your unknown, with the actual [SCN", suggest reasons for the disparity. 2.Explanation / Answer
1)
For the Ka1 reaction
H2SO3 ============== H+ + HSO3-
Ka = [Products]/[Reactants] = [H+][HSO3-]/[H2SO3]
For the Ka2 reaction
HSO3- ============== H+ + SO3(2-)
Ka2 = [Products]/[Reactants] = [H+][SO3(2-)]/[HSO3-]
2)
The balanced reaction will be
2NaOH + H2SO3 ------------ Na2SO3 + 2H2O
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.