nezza - 5-3-2017 at 04:02
here's a quick test. What reaction is shown in the attached video. It is shot in real time.
Attachment: Test.mp4 (3.4MB)
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nezza - 5-3-2017 at 05:24
Here's a clue. The liquid is just water.
fluorescence - 5-3-2017 at 05:45
Maybe Sodium Peroxide in water? The color would fit but I am unsure about the reactivity.
nezza - 5-3-2017 at 07:43
Clue 2. The object dropped in is an element.
Magpie - 5-3-2017 at 09:40
sulfur chunk into superheated water.
nezza - 5-3-2017 at 11:23
Cold water. The gas released is hydrogen.
phlogiston - 5-3-2017 at 13:09
Europium.
nezza - 6-3-2017 at 00:36
Spot on. I had a sample of Europium in my element collection which had got a heavy coating of oxide/carbonate from storage so I thought I would clean
it up. While doing so I cut off a small amount to experiment with. The reaction with water is supposed to be similar to that of Calcium. It is Waay
more rapid than that as can be seen from the video. I have attached a video of Strontium reacting with water and Europium reacts more violently than
that. The yellow colour I suppose to be Eu(II) as on standing it gets much paler and on ignition of the residue gives white Eu(III) oxide. I have a
couple of other observations.
The metal is soft - about as hard as lead.
The metal reacts with methanol, although I cannot be sure that this is not due to small quantities of water in my methanol. The group II metals do
not.
The hydroxide suspension does not react alkaline so its solubility must be very low
I am going to use the remainder of the hydroxide I have to look at a few other Europium compounds.
Attachment: Strontium small.mp4 (7.7MB)
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[Edited on 6-3-2017 by nezza]