Problem: 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?decreases            increasesThe extent of HNO2 ionization _____the concentration of H+ _____The pH _____

FREE Expert Solution

HNO2 H+ + NO2-

KNO2 K+ + NO2-


addition KNO2 addition NO2-

NO2- product

increase/add NO2- shift reaction to the left

increase reactant and decrease product

increase [HNO2] and decrease [H+] and [NO2-]


ionization  acquiring a negative or positive charge

addition NO2- decrease [H+] and [NO2- extent ionization


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Problem Details

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?

decreases            increases

The extent of HNO2 ionization _____

the concentration of H+ _____

The pH _____

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Weak Acids concept. If you need more Weak Acids practice, you can also practice Weak Acids practice problems.