Separate samples of a solution of an unknown ionic compound are treated with dilute AgNO3, Pb1NO322, and BaCl2. Precipitates form in all three cases. Which of the following could be the anion of the unknown salt: Br-, CO32-, NO3-?

Video transcript

Hi everyone here we have a question telling us that an unknown salt is suspected to contain either iodine, phosphate or sulfate. three samples of the same salt were mixed in solutions of copper Pirkle, right, Mercury Park Lory and showed and bromide and a precipitate form for each set up. And our goal is to identify the an ion of the salt. So we need to remember three rules here. Fast fates are insoluble except when with group one A. Ions or ammonium highlights are soluble, except when with silver word copper or mercury. Sulfates are soluble except when with calcium astronomy, um barium, silver or lead. So for the ions copper, mercury and strain E. Um Fast fate is the only an ion that will cause a precipitate for all of them. So our answer here is phosphate. Thank you for watching. Bye.