Testing for halide ions. The objective of the experiment was: Be able to identify halides using silver nitrate and ammonia.
Activity: 15 Chemistry practical Jaspreet Kaur, IB1
Testing for halide ions
Objectives:
The objective of the experiment was:
- Be able to identify halides using silver nitrate and ammonia.
Equipment required:
Introduction:
A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative (or more electropositive) than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound. A halide ion is a halogen atom bearing a negative charge. The halide anions are fluoride (F-), chloride (Cl−), bromide (Br−), iodide (I−) and astatide (At−). Halide compounds such as KCl, KBr and KI can be tested with silver nitrate solution, AgNO3. The halogen will react with Ag+ and form a precipitate, with varying colour depending on the halogen. And, then by adding ammonia; the solution is acidified by adding dilute nitric acid. The nitric acid reacts with, and removes, other ions that might also give a confusing precipitate with silver nitrate.
