Saved Bookmarks
| 1. |
In qualitative analysis, on what basis cations are grouped ? |
|
Answer» al qualitative inorganic analysis is a method of analytical chemistry to find the elemental composition of inorganic compounds. It is MAINLY focused on detecting ions in an aqueous solution. The solution is treated with reagents to test for reactions characteristic of certain ions, which may cause color change, solid forming, and other VISIBLE changes.Cations are divided into six GROUPS. Each group has a common reagent that can be used to separate them from the solution. Because CATIONIC analysis is based on the solubility products of the ions, meaningful results can be obtained only if separation is performed in a specified sequence. This is due to the fact that some ions of one group may also react with the reagent of another group. For EXAMPLE, both Ba2+ and Sr2+ will react with the SO42- ion to form a solid. Hence, mathematical calculations should be done before choosing the SO42- ion for selective precipitation in a solution that may contain both Ba2+ and Sr2+. |
|