You are supplied with two jars containing aqueous solutions labeled \"Acid\" and

Question

You are supplied with two jars containing aqueous solutions labeled "Acid" and" Base". Your instructor tells you that the acid is one of the following: nitric acid. HNO_3, hydrochloric acid, HCI, or propanoic acid. HC_3H_5O_2. The base is either NH_3, NaOH, or KOH A. The conductivity of each solution is tested. The base is a strong electrolyte, while the acid is a weak electrolyte. Which of the six solutions listed above can now be eliminated? Briefly explain your logic. B. A 20.00 mL sample of the acid is titrated with the base, using phenolphthalein as the indicator. The end point is reached upon the addition of 30.00 mL of base. The titration is then repeated using a pH meter. The following data is obtained: i. Show how you could use the titration data to find the Ka of the acid. The Ka is listed as 1.3 times 10^- s ii. Based on the pH before the addition of base, what is the molarity of the acid? iii. What is the molarity of the base? iv. What is the pH of the solution at the equivalence point?

Explanation / Answer

1. in the category of acids the nitric acid, hydrochloric acid, propanoic acid can be eliminated as they are strong acid, while in case of bases ammonia can be elimintaed being a weak base

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