5. Report the average percent acetic acid in the unknown vinegar sample. Questio

Question

5. Report the average percent acetic acid in the unknown vinegar sample. Questions 1. Write a balanced equation for this titration. 2. What type of reaction is involved in this experiment? 3. Why should the buret be rinsed with a standardized sodium hydroxide solution before it is filled? 4. What purpose does the indicator. phenolphthalein, serve in the titration? 5 Wht are equivalence poinis and end points and how do they diften undergoes acooChange fron oF acd equel tli The equivalknce points' is where the amouu of acid equel the 6. What is the molarity of a solution that contains 2.47 g of H2S04 in 0.350 L of solution?he pt n a solustion. Ay small amouht of acid or ase on chane he ontains247g of H2SO4 in 0.350 L of solution-Reet 7. Complete and balance the following equations: .ac i END a) Ba(OH)2(s)+HNO3(aq) a) Ba(OH)2e)+ HNO(ag)a (NO3) (aqtH20)

Explanation / Answer

(3)

The buret should be rinsed with the NaOH solution before filling because there is water present on the inner surface of the buret, and if it is not rinsed with NaOH prior to filling, then the NaOH solution will mix that small amoun of water present inside and will get diluted to some extent, and hence will produce an error in the final calculation.

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