C.B.S.E Sample Papers With Complete Solution Class 12
English Mathematics Physics Chemistry Biology

Sunday, July 10, 2011

Q-The titration of 10.00 mL of a diprotic acid solution of unknown concentration requires 21.37 mL of a 0.1432 M NaOH solution. What is the concentration of the diprotic acid solution?


solution :-
The titration of 10.00 mL of a diprotic acid solution
we get volume of given diprotic acid (V1) = 10 ml 
diprotic acid always gives 2 H + ions 
                          so number of of H + (N1) = 2
                   molarity of diprotic acid (M1) = ?
21.37 mL of a 0.1432 M NaOH solution
NaOH gives only one OH ions 
                                           so value of N2 = 1 
                                                 Volume V2 = 21.37 ml
                                        and molarity M2 = 0.1432 M

Formula for the reaction   
                                               M1*V1* N1= M2*V2*N2
          plug all values we get 
                                        M1 * 10.00ml*2 = 0.1432 *21.37 ml * 1 
          solve this condition we get 
                                                             M1 = 0.1530 M 

Answer :-   molarity of diprotic acid is 0.1530 M 

The titration of 10.00 mL of a diprotic acid solution
Q-The titration of 10.00 mL of a diprotic acid solution of unknown concentration requires 21.37 mL of a 0.1432 M NaOH solution. What is the concentration of the diprotic acid solution?
 

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