Ttration Curve Comparison 14 12 10 b5 10 15 mL 0.1 M NaOH added 20 25 30 35 1. W

Question

Ttration Curve Comparison 14 12 10 b5 10 15 mL 0.1 M NaOH added 20 25 30 35 1. Which of the two curves, A or B, represent the reaction of a strong acid with strong base? 2. Which of the two curves represent the reaction of a weak acid with strong base? 3. Estimate the pKa value of the weak acid analyzed in the correct titration curve above. strung aud has a louer statng pH has a higher stofhng pt and plateaus reur oad's plaval 4. In a strong acid-strong base titration, the pH at the equivalence point is Explain why.

Explanation / Answer

1.B because for strong acid and strong base the jump in pH at equivalence is very sharp.

2.A

3. Answer is 4.8 which is given by pH corresponding to half of volume required for equivalence point that is at 25/2 ml = 12.5 ml. The pH corresponding to this volume is 4.8.

4. The pH is 7 because strong acid and strong base conjugates remain inert without creating any H+ or OH- by reacting with H2O.

Comment if any doubt.

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