High-speed footage of the mercury iodide tornado demonstration. The beaker contains a solution of potassium iodide, with a vortex created by a magnetic stirrer. Mercury (II) chloride is added to the centre of this vortex. This forms an insoluble precipitate of yellow rhombic mercury (II) iodide, which rapidly undergoes a modification to orange tetragonal mercury (II) iodide. As the mercury iodide is spun away from the vortex it encounters a greater concentration of potassium iodide, and it forms colourless potassium tetraiodomercurate, which dissolves again. The equations for the reactions are:HgCl2 + KI --> HgI2 + KClHgI2 + KI --> K2[HgI4]
Details
WebID:
C01808854
Clip Type:
RM
Super High Res Size:
1920X1080
Duration:
00:00:37.000
Format:
QuickTime
Bit Rate:
25 fps
Available:
download
Comp:
200X112 (0.00 M)
Model Release:
NO
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No