This preview shows page 1. Sign up to view the full content.
Unformatted text preview: Split the solution into two parts. Verification for Ba +2 : To one portion from the above step, add a few drops of potassium chromate. A precipitate, barium chromate, confirms the presence of barium. Verification of Calcium: To the other solution, add a few drops of sodium oxalate. The presence of a precipitate verifies calcium. Group V: Group V ions can be thought of as everything left over. We will assume this group contains only K + , although many qualitative analysis schemes include Na + , Mg +2 and NH 4 + as well. Flame test for K + : Take an iron loop and clean it by putting it into a hot flame until the loop glows red hot (be careful not to burn yourself). Allow the loop to cool, and dip it in the remaining decantate from the group IV separation step. Be sure a drop is on the wire. Put the drop into the flame; a red flame verifies potassium. Calculations:...
View Full Document
- Fall '11