page 14 Exp. 9: Acid Base Titration Questions (show your work for the math problems!) 1....

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page 14 Exp. 9: Acid Base Titration Questions (show your work for the math problems!) 1. Write a balanced equation as in footnote 2 for the neutralization of formic acid with sodium hydroxide. H COON NaOH → H COONA + H;0 H-C-OH Formic acid 2. If an air bubble is present initially in the tip of the vinegar buret, but 'disappears' during the course of the titration, how would this affect your calculation for the concentration of acetic acid (larger, smaller, no effect)? Explain your answer. 3. Explain how the indicator phenolphthalein works. Why does it turn pink only when n = Phuon? 4. Using a pipet, 20.00 mL of acetic acid is titrated with 0.2000 M solution of NaOH. The initial reading in the NaOH buret is 1.12 ml. When the solution is very light pink, the buret reads 24.37 ml. What is the concentration of acetic acid both in M and in %? 5. Remembering that sulfuric acid (H,SO,) is a diprotic acid (i.e., has two acidic H's) write the NaOH would be required to neutralize 25.00 mL of a 0.100 M solution of sulfuric acid? page 14 Exp. 9: Acid Base Titration Questions (show your work for the math problems!) 1. Write a balanced equation as in footnote 2 for the neutralization of formic acid with sodium hydroxide. H COON NaOH → H COONA + H;0 H-C-OH Formic acid 2. If an air bubble is present initially in the tip of the vinegar buret, but 'disappears' during the course of the titration, how would this affect your calculation for the concentration of acetic acid (larger, smaller, no effect)? Explain your answer. 3. Explain how the indicator phenolphthalein works. Why does it turn pink only when n = Phuon? 4. Using a pipet, 20.00 mL of acetic acid is titrated with 0.2000 M solution of NaOH. The initial reading in the NaOH buret is 1.12 ml. When the solution is very light pink, the buret reads 24.37 ml. What is the concentration of acetic acid both in M and in %? 5. Remembering that sulfuric acid (H,SO,) is a diprotic acid (i.e., has two acidic H's) write the NaOH would be required to neutralize 25.00 mL of a 0.100 M solution of sulfuric acid?

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Answer 1 HCOOHaq NaOHaq gives HCOONa H2Oaq 2 In the experiment the buret contains NaOH If the ... View the full answer