What happens when KNO2(s) is dissolved into the solution?

Question

At a concentration of 1 M, the weak acid HNO2 is 2% ionized and the pH of the solution is 1.7. What happens when KNO2(s) is dissolved into the solution?The extent of the HNO2 [increases / decreases]The concentration of H+ [increases / decreases] The pH [increases / decreases]

Orlo Kling DDS · Accepted Answer

Use LeChatelier’s principle to help you think this problem out:HNO2  H+ + NO2- Since the acid is only 2% ionized in solution, we know that the equilibrium is strongly favored to the reactant. If you stress a system, it will shift to relieve that stress, so adding more NO2- will cause more HNO2 to be produced, thus reducing the H+ conc in solution.So,Ionization decreases,H+ conc. decreases,pH increases (it becomes more basic due to less H+)

Orlo Kling DDS · Answer

If you Add KNO2 then you’re getting more NO2 in the reaction HNO2 —> H +NO2 So the right side of the equation has more than the left, and due to Le’Chatellier’s principle, the reaction would naturally want to shift to the left. Therefore, Less H+ is made. This is the best explanation you will get 🙂

Lamar Hirthe

What happens when KNO2(s) is dissolved into the solution?

2 Answers

AI-Powered Insights

Want to answer this question?

Categories

Tags

Related Questions