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| What is this metal? |
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| asmi:
--- Quote from: Benta on May 05, 2021, 05:52:19 pm ---My guess would be cobalt. --- End quote --- Cobalt Sulfate solution has a red color. |
| asmi:
Zinc? Do the flame test to see the color. Zinc would give blue-green color. |
| Gregg:
It is probably zinc or a zinc alloy from the look of the structure along the broken sides and reaction to sulfuric acid. Flame tests are often contaminated by sodium which tends to overpower the color of other elements unless they are quite pure. |
| JohnnyMalaria:
--- Quote from: Refrigerator on May 05, 2021, 05:45:40 pm ---I wonder can i just pour some of the acid solution into some ethanol and watch the color as it burns? --- End quote --- Maybe. The ethanol may burn with an orange flame (carbon) if you don't provide enough oxygen (like a yellow flame from a Bunsen burner with the vent closed vs. blue flame when open). You could let some of the ethanol solution evaporate on a suitable utensil. If you cook with gas, just put some on the end of a stainless steel knife and place it in the blue flame. |
| Refrigerator:
Adding ethanol really made the crystals crash out. Burning the ethanol solution did not reveal much, other than some orange licks of flame, but those might be just an incomplete burn of the ethanol. After the ethanol burned off there was no residue but the spot did smell pretty strongly of sulphuric acid. I agree that it could be zinc, as i remember zinc is pretty dense and makes some large crystals. |
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