Part A Express the pH numerically. pH = Try Again; 5 attempts remaining pH = Try

Question

Part A Express the pH numerically. pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Try Again; 5 attempts remaining pH = Part B What is the pH of the solution at theequivalence point? Express the pH numerically. pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH =7.00 pH = Try Again; 5 attempts remaining

Explanation / Answer

a )          Balancedchemical equation :                                             HCl          +   NaOH -----------> NaCl + H2O   Beforerxn                 0.1 L * 0.2 M        0.05 L *0.250 M        0                                      = 0.02mols                0.0125 mols Afterrxn             0.02 mols - 0.0125mols       0                                   = 0.0075 mols                                                 [H+]   = 0.0075 mols / 0.1L + 0.05 L                                                           = 0.05 M                                                    pH  = - log ( 0.05 )                                                           = 1.30 b ) At the equivalence point pH will be 7 ,coz it is a strong acid and strong base titration.

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