PRE-LAB QUESTIONS 1. Below are some observations that were made when tests were carried out on solutions for specific ions. Based on the observed result, what is the most likely ion present in the solution? a. Heating produced a gas with a strong irritating odor; the gas changed moistened red litmus to blue. b. A white precipitate formed with barium chloride, BaCl2. c. A solution treated with potassium iodide, KI, turned reddish-brown and produced a violet colored layer with hexane. d. A solid produced a bright yellow color in a flame. e. A white precipitate formed with silver nitrate solution [AgNO3(aq)].