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Nitrous acid (molecular weight = 47.01 grams) is added to pure water and the following reaction occurs: HNO2 + H* + NO2 If the initial nitrous acid concentration is 100 mg/L and the equilibrium constant K, = 4.0 x 10“, what are the equilibrium concentrations of nitrous (NO2) and nitric acid (HNO2) in mol/L? Be sure to check that your assumptions for developing an ICE table are valid. Note: Make sure you don't confuse nitrous acid for nitric acid!

Nitrous acid (molecular weight = 47.01 grams) is added to pure water and the following reaction occurs: HNO2 + H* + NO2 If the initial nitrous acid concentration is 100 mg/L and the equilibrium constant K, = 4.0 x 10“, what are the equilibrium concentrations of nitrous (NO2) and nitric acid (HNO2) in mol/L? Be sure to check that your assumptions for developing an ICE table are valid. Note: Make sure you don't confuse nitrous acid for nitric acid!

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Nitrous acid (molecular weight = 47.01 grams) is added to pure water and the following reaction Occurs: HNO2 → H* + NO2 If the initial nitrous acid concentration is 100 mg/L and the equilibrium constant K, = 4.0 x 10“, what are the equilibrium concentrations of nitrous (NO2) and nitric acid (HNO2) in mol/L? Be sure to check that your assumptions for developing an ICE table are valid. Note: Make sure you don't confuse nitrous acid for nitric acid!
Transcribed Image Text:Nitrous acid (molecular weight = 47.01 grams) is added to pure water and the following reaction Occurs: HNO2 → H* + NO2 If the initial nitrous acid concentration is 100 mg/L and the equilibrium constant K, = 4.0 x 10“, what are the equilibrium concentrations of nitrous (NO2) and nitric acid (HNO2) in mol/L? Be sure to check that your assumptions for developing an ICE table are valid. Note: Make sure you don't confuse nitrous acid for nitric acid!
Expert Solution
Step 1

Given, equilibrium reaction is:

HNO2 ⇌  H++ NO2-

Initial concentration of HNO2 is ------- 100mg/L.

Equilibrium constant Ka=4.0×10-4

What are the equilibrium concentrations of NO2- and HNO2?

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