One litre of a solution contains 18.9 gm of HNO_(3) and one lire of another solution contains 3.2 gm of NaOH. In what volume ratio must these solutions be mixed to obtain a neutral solution?

One litre of a solution contains 18.9 gm of HNO_(3) and one lire of an

1.	One litre of a solution contains 18.9 gm of HNO_(3) and one lire of another solution contains 3.2 gm of NaOH. In what volume ratio must these solutions be mixed to obtain a neutral solution?
Answer» Solution : X.is a buffer solution ` PH = pk_a+ log ([" Salt"])/(["acid"])` .Y. is a solution CONTAINING acid HCl and base `CH_3 COOK `which give 1 mole of `CH_3 COOH,` a weak base. ` pH =(pK_a - logC)/(2) = (pK_a)/(2)` The pH RATIO of solution .X. and solution .Y. `= PK_a ,( pk_a)/(2) =2:1`