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Write the balanced NET IONIC equation for the reaction that occurs when nitrous acid and potassium...

Write the balanced NET IONIC equation for the reaction that occurs when nitrous acid and potassium hydroxide are combined.

The extent of this reaction is: .
This reaction is classified as .
A. Strong Acid + Strong Base
B. Weak Acid + Strong Base
C. Strong Acid + Weak Base
D. Weak Acid + Weak Base

A. ... Below 50%
B. ... 50%
C. ... Above 50%
D. ... 100%

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Expert Solution

HNO2 is a weak acid , reacts with strong base KOH to form salt
and water . Since acid is weak it will not ionize completely in water
molecular equation
HNO2 (aq) + KOH(aq) --> KNO2 (aq) + H2O(l)

total ionic

HNO2 (aq) + K+(aq) + OH-(aq) --> K+(aq) + NO2- (aq) + H2O(l)

spectator ion is K+

Hence
Net ionic equation
***
HNO2 (aq) + OH-(aq) --> NO2- (aq) + H2O(l)
*************************************************

This reaction is classified as .

B. Weak Acid + Strong Base
*******************************

In acid base reaction , favored reaction is the formation of weaker
acid and base. This will give very high equilibrium constant
value. That means such king of reaction goes to completion 100%

HNO2 (aq) + OH-(aq) --> + NO2- (aq) + H2O(l)
Here H2O is weaker acid than HNO2 and NO2- is a weaker base than
OH-. Hence the reaction is product favored. Reaction goes to
100 % completion

Answer
Extent of reaction is

D: 100 % completion

************
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queen_honey_blossom answered 1 year ago

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