Consider the titration of a 28.0 −mL sample of 0.175 M CH3NH2
with 0.155 M HBr....
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Chemistry
Consider the titration of a 28.0 −mL sample of 0.175 M CH3NH2with 0.155 M HBr. Determine each of the following. 1. the inital pH2. the volume of added acid required to reach the equivalence point3. the pH at 6.0 mL of added acid 4. the pH at one-half of theequivalence point 5. the pH at the equivalence point 6. the pHafter adding 5.0 mL of acid beyond the equivalence point
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First lets calculate the moles of the innitial reactant Base Base B CH3NH2 Acid A HBr moles B 0175 0028 49x103 moles Now lets determine the pH at given parts Kb 5x104 and Ka 2x1011 1 Innitial pH r B H2O BH OH i 0175 0 0 e 0175x x x 5x104 x2 0175x Kb is small
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