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18 Nov 2019
5. A student performed the experiment but forgot to bring the flowchart with them to the lab. These are the notes they made from the experiment: 5 drops of 6 M HCI was added to the unknown, and a white precipitate formed. The white precipitate was still present in the same amount after it was washed and boiled in deionized water. The supernatant was tested with K2CrO4, turning the solution yellow. - 6M NHa was added to the supernatant from the first step until the red litmus paper turned blue (10 drops), no precipitate was observed 5 drops of K2CrO4 was then added, and a yellow precipitate formed. The decanted liquid was tested with H-DMG, forming a pink precipitate. What cations were present in this student's unknown?
5. A student performed the experiment but forgot to bring the flowchart with them to the lab. These are the notes they made from the experiment: 5 drops of 6 M HCI was added to the unknown, and a white precipitate formed. The white precipitate was still present in the same amount after it was washed and boiled in deionized water. The supernatant was tested with K2CrO4, turning the solution yellow. - 6M NHa was added to the supernatant from the first step until the red litmus paper turned blue (10 drops), no precipitate was observed 5 drops of K2CrO4 was then added, and a yellow precipitate formed. The decanted liquid was tested with H-DMG, forming a pink precipitate. What cations were present in this student's unknown?
Deanna HettingerLv2
6 Jan 2019