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The number of grams/weight of NH4Cl required to be added to 3 liters of 0.01M NH3 to prepare the buffer of pH=9.45 at temperature 298K

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The number of grams/weight of NH4Cl required to be added to 3 liters of 0.01M NH3 to prepare the buffer of pH=9.45 at temperature 298K 

(Kb for NH3 is 1.85 x 10–5) 

(A) 3.53 gm 

(B) 0.354 gm 

(C) 4.55 gm 

(D) 0.455 gm

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Correct option (B) 0.354 gm

Explanation:

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