1) Would the calculated molarity of the unknown acid solution be higher, lower,
ID: 1027961 • Letter: 1
Question
1) Would the calculated molarity of the unknown acid solution be higher, lower, or not affected if each of the following occurred. Explain your answers. a. The buret containing NaOH was rinsed with distilled water but not rinsed with NaOH before being filled. b. Your lab instructor miscalculated the Molarity of the NaOH solution you used in the titration (the true molarity was higher than calculated by your instructor). The tip of the NaOH buret contained an air bubble at the beginning of the titration but not at the end. c. 2) Suppose you used an unknown H2504 concentration instead of HCI. What changes would need be made to the calculations of the concentration of the acid?Explanation / Answer
Ans 1 :
a) When the buret was rinsed with water and then not rinsed with NaOH before the titration , the NaOH in the buret gets diluted. So more amount of NaOH will be required for the titration of the acid. So the calculated molarity of the acid will come out to be more.
b) If the true molarity is higher than the calculated molarity of NaOH , so less NaOH will be required for the titration , so the molarity of acid will also come to be less.
c) The air bubble caused the false raised volume of NaOH , so the molarity of acid will also come out to be more.
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