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Calculatethe ratio of pHof a solutioncontaining 1 moleof CH_(3)COONa+ 1mole of HCl perlitreandof othersolution containing 1 moleof HClper litreand of other solutioncontaining 1 moleCH_(3)XCOoNa+ 1moleof aceticacid per litre . |
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Answer» Solution :CaseI : pH when1 mole`CH_(3)COONA`and 1 moleHCl are present . `{:(,CH_(3)COONa,+,HCL,to,CH_(3)COOH,+,NaCl),(" Before reaction",1,,1,,0,,0),("After reaction",0,,0,,1,,1):}` ` :. [ CH_(3)COOH] = 1 M ` ` :. [H^(+)]= C .alpha= C sqrt(((K_(s))/(C))) = sqrt(K_(a).C) = sqrt((K_(s))) "" :.C = 1 ` ` :. pH_(1) = -1/2 logK_(a)` CaseII . pH when1 mole`CH_(3)COONa`and 1 molemole of `CH_(3)COOH` , a buffersolution ` :.pH_(2) = - log K_(a)+log. (["salt"])/(["acid"])"":.["Salt"]=1M` ` pH_(2) = -logK_(a) "":. ["Acid"] = 1 M` ` :. (pH_(1))/(pH_(2))=1/2` |
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