To decrease the % ionization of hno2, which salt would you add to the solution a) nacl b) kno3 c) kno3 d) nh4cl e) naoh

Explanation:

HNO₂ ionizes in the following way -

HNO₂ + H₂O > H₃O⁺ + NO₂⁻

Hence , if we add ions of NO₂⁻ , it will increase the concentration of these ions towards the right side , and the reaction will proceeds in the backward direction , because of the Le - Chateliers principle ,

Hence from the options given in the question ,  none will be able to bring the reaction , back , i.e. reduce the ionization .

But in case we use KNO₂ , then , it is capable to reduce the ionization of HNO₂ .

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