【Daily Question】Chemical Analysis Version, 2021.9.16
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The incorrect statement regarding the handling of mercury is A: Mercury salt waste solutions should first have their pH adjusted to 8-10; then an excess amount of Na2S is added, followed by FeSO4, which results in the co-precipitation of HgS and FeS for subsequent recovery. B is correct – mercury that has spilled on the floor can be covered with sulfur powder and cleaned up after it dries. C is also correct – mercury on the laboratory bench can be collected using appropriate methods in a beaker containing water. D is correct as well – floors where mercury has spilled can be sprayed with a 20% FeCl2 solution, and then cleaned up after it dries
D. The floor where mercury has spilled can be sprayed with a 20% FeCl2 aqueous solution, and then cleaned up after it dries
It seems like D doesn’t react much with Hg and FeCl2, right? Without redox reactions