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# What is M1V1=M2V2 different from M1=M2V2/(V1+V2)and N1V1=N2V2

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Solution

## Dear student, The normality equatio (N1V1=N2V2) is the direct result of law of equivalent which can be derived as follows. We know, normality=no. Of gram equivalent÷ litre of solution No. Of g equivalent = litre of solution× normality at the equivalent point of titration No. Of g eq. Of acid=No. Of g eq. Of base Or, litre of acid solution×normality of acid=litre of base solution×normality of base Or, V1N1=V2N2 This is normality equation. To prepare a fixed amount of dilute solution, we have a formula M1V1 = M2V2 Where, V1 denotes the Volume of stock solution needed to make the new solution M1 = Concentration of stock solution V2 is the final volume of the solution. M2= concentration of new solution Regards

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