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vano
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What is this metal?
Hi today i found chemical jar, full of this metal pieces, label was lost. I don't know exactly what it is. First it is hard and have low melting
point, but it isn't tin or lead(its hard), also not zinc because it didn't dissolved in conc. HCl and dillute H2SO4. Not cadmium because when i melted
this granules, colored oxide didn't produce. I think its pure metal, I've seen metal alloys in lab, but always they are powders.
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Sulaiman
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Indium ?
CAUTION : Hobby Chemist, not Professional or even Amateur
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vano
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No, i have indium, You can chew it like gum.
After melting:
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woelen
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Does it dissolve in conc. HNO3?
What if added to a mix of conc. HCl and 30% H2O2?
If it dissolves in one of the above, what color does its solution have?
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vano
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Thanks woelen. I thought that, i have azeotropic nitric acid and 50% peroxode but unfortunately in another city. Here i have mentioned acids, conc
phosphoric acid (i think it isn't interesting) and hypochlorite 15% solution, i will use hypochlorite. Either way I do, I’m sure it will dissolve in
nitric acid
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zed
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Flame test.
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rockyit98
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easiest way is to find out density using lab scale and do a comparison . also try and find the melting point if can.
"A mind is a terrible thing to lose"-Meisner
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DraconicAcid
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Zinc can be passivated and not react with acid in the absence of copper.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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paulll
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Mood: It's fine. Really.
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Yes, it'd be interesting to see what happens on mixing it with sulphuric again but with a dash of CuSO4 chucked in.
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Bedlasky
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It's better to add HCl, sulfuric acid is somewhat dull in this. Piece of aluminium foil refuse to dissolve in battery acid even when heated.
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paulll
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Mood: It's fine. Really.
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Quote: Originally posted by Bedlasky  | | sulfuric acid is somewhat dull in this. Piece of aluminium foil refuse to dissolve in battery acid even when heated. |
...whereas with a little Cu2+ in the mix it should react quite nicely with Zinc.
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fusso
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Objection, i tried dissolving Zn in
dil H2SO4 without adding any Cu containing substances and they did react.
[Edited on 210505 by fusso]
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UranylPeroxysulfate
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Zinc does dissolve in acid (both hydrochloric and sulfuric) without copper. Aluminum doesn't dissolve in sulfuric acid unless heated to ~80C.
I looked up a list of metals with a low melting point, here are some possibilities:
Silver: m.p. 962C. Matches all the chemical properties you described.
Bismuth: m.p. 271C. Matches all the chemical properties you described except that it produces colored oxides when melted.
Less possible ones:
Thallium: m.p. 304C. Too soft and dissolves in HCl.
Cerium: m.p. 795C. Too reactive; it even reacts with water. The same goes for lanthanum with m.p. 920C.
Plutonium: m.p. 639C. Dissolves in HCl. I don't really think you can have plutonium.
If something does work, sulfonate it.
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UranylPeroxysulfate
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Another note:
Very few metals dissolve in hypochlorite solution. If you don't have HNO3 or H2O2, I suggest electrolytically oxidizing the metal into a dilute HCl
solution and look at the color of the solution. This method can even dissolve gold and platinum if done correctly.
If something does work, sulfonate it.
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vano
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I have but not here, I will try this reactions maybe a week later. It didn't dissolved in hypochlorite, but next i added acid and when chlorine
produced foil of this metal almost disappeared, only left some black piecies.
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phlogiston
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Bismuth?
Does it feel unusually dense if you hold a bunch of granules in your hand?
Try concentrated H2SO4, or add hydrogen peroxide to your hydrochloric acid.
Or nitric acid, if you have that.
[Edited on 5-5-2021 by phlogiston]
-----
"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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vano
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No it isn't Bismuth. I have many metals, but It does not look like them. That's why I'm very interested. Thank you I will try (week later).
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Sulaiman
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+1
CAUTION : Hobby Chemist, not Professional or even Amateur
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symboom
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Great idea Sulaiman
Sense we don't have a post voting
Like a group populated answers poll.
Flame test
+1
I'm guessing aluminum because when you dissolve aluminum wire sometimes black pieces come off. Sometimes it's white or gray.
The density can be checked by weighing the object then using the water displacement trick. The change in water volume is used as the volume.
[Edited on 5-5-2021 by symboom]
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vano
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I will make flame test, but before that it must be dissolved in acid, at least one week i can't. I will determine the density with water. Thank you
everyone for your ideas.
[Edited on 5-5-2021 by vano]
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RogueRose
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could it be an alloy like Woods metal or Rose's metal?
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vano
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Hmm interesting. It has really low melting point, it instantly melted. I will put it in boiling water. Almost all alloys in lab are powder, but Wood's
metal and such metals which have low melting point maybe not. Thanks!
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rockyit98
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if you add little HCl to the dilute H2SO4 it makes a huge of different to reaction with Al room temperature. once the reaction gets going the heat
will make it more so , also it will also boil the initial HCl but since the hotter reaction temperature will compensate for that.
"A mind is a terrible thing to lose"-Meisner
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vano
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It's melted in boiling water. I will determine density and that is. Dissolve in acid isn't necessary.
 
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vano
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Where can i found alloys with density ?
[Edited on 6-5-2021 by vano]
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