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Unformatted text preview: Iodide Post-Laboratory Questions 1. Ammonia is added to the precipitate in Test II Step #2. Since ammonia is a base and NaOH is a base, can NaOH be substituted for the NH 3 solution? Why? Explain briefly. NaOH might be a base but it can't be subsituted for NH3 solution because NH4+ is always soluble so any compound it forms is soluble. But if NaOH was used, the OH- ions that dissociate will form with the Ag+ ions and form an insoluble precipitate. NaOH would not be a suitable precipitate. 2. Why are the halogens powerful oxidizing agents? Define what an oxidizing agent is. An oxidizing agent is a chemical compound or element that easily gains electrons. Halogens are powerful oxidizing agents because they have 7 valence electrons. Therefore, they only need to gain one electron to achieve greater stability. This is according to the octet rule....
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This note was uploaded on 05/02/2008 for the course CHE 1121L taught by Professor Ishwar during the Spring '08 term at St. Johns Duplicate.
- Spring '08