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Questions tagged [metal]

For questions about metals in general and their physical or chemical properties. For characteristic properties and reactions of d and f block metals specifically, use the [transition-metals] and [rare-earth-elements] tags respectively instead.

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Is there such thing as metallic helium?

I know that hydrogen can behave as a conductor under high pressure (metallic hydrogen); however could helium behave similarly under high pressure? If so, could this have any potential benefits over ...
Nitrogen-8's user avatar
14 votes
3 answers
1k views

Is anything other than metals soluble in molten metals/alloys?

The question stems from my search on staining metals; in particular I commonly encountered "Can you dye a molten metal" questions, with the usual, simple answer of "any pigment will ...
SF.'s user avatar
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Binding energies of transition metals in the 3d series

Binding energy of the transition elements in the 3d series increases up to vanadium then drops from chromium to manganese and then increases slightly and then drops again It is seen that binding ...
Tabi Khan's user avatar
3 votes
0 answers
31 views

Thermostability of Metal Carbonates and Nitrates

While studying in high school, I came across the following thermal decomposition reactions: $$\ce{Li2CO3 -> Li2O + CO2 }$$ $$\ce{MgCO3 -> MgO + CO2}$$ $$\ce{PbCO3 -> PbO + CO2}$$ $$\ce{Ag2CO3 ...
Arnav Ranka's user avatar
13 votes
3 answers
2k views

Do electrons really hang around the electrode while ions go take a swim?

This answer to this post addresses "what happens if you dip a single zinc electrode into some electrolyte solution." It explains that However, though the zinc ion can diffuse through the ...
Buck Thorn's user avatar
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2 votes
2 answers
116 views

Does the electric field of a battery exist before a wire is connected outside?

Imagine a galavanic cell. What I am wondering is, what causes the inital oxidation of the less nobel metal to occur initally. Is the electric field there before you connect a wire, which would allow ...
Niclas's user avatar
  • 129
7 votes
1 answer
524 views

Buildup of white powder where metal has been touching a salt stone

The other day, I opened a box for my cellar I use to store random junk and found this: The pink stone is a salt stone from a pet store. I assume it's NaCl with impurities. The ring is some metal ...
Feuermurmel's user avatar
2 votes
1 answer
141 views
+50

Metallic nanostructures exhibiting charge separation

Mostly ions consist of a few atoms. It is easy to see, why the solids they form must have simple stoichiometries. It is true even for polymeric ions, such as some complicated organic molecular ions as ...
Paul Kolk's user avatar
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0 answers
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How to coat stainless steel?

I am trying to coat stainless steel with carbon black. I am using Polyvinylidene fluoride PVDF 2% as a binder. I dip and I heat at 100C. The coating that comes out is very fragile where you can blow ...
Anwer Ak's user avatar
14 votes
4 answers
3k views

Does molten metal liquid chromatography exist?

Liquid chromatography is used to analyze and purify different chemical samples in a solvent. It is also used for industrial scale chemical purification. I was wondering if something similar exists for ...
ericnutsch's user avatar
7 votes
0 answers
133 views

Metal hydrolysis and equilbrium constants from stability constants

Problem: I want to create minimum solubility plots for a series of metal hydrolysis species against pH (below). But I cannot reconcile literature stability constants and equilibrium constants. Context:...
NFA's user avatar
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0 answers
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Cleaning Cobalt with Dodecylbenzene Sulphonic Acid

Here in Brazil we use a special detergent to clean up metals, based on Dodecylbenzene Sulphonic Acid, it is very effective at shining up all sorts of different metals. I recently acquired 2 samples of ...
Lympadjambrus's user avatar
1 vote
0 answers
31 views

Unusual Inconsistencies in Gibbs Free Energy Values at Specific Temperatures in Thermodynamic Simulation

I was using FactSageEdu software to simulate a metal with a composition of 67% titanium (Ti) and 33% aluminum (Al). During the simulation, I encountered an inconsistency in the calculated Gibbs free ...
Harsh's user avatar
  • 21
5 votes
1 answer
317 views

Can a colorant be mixed into zirconia powder?

I’m wanting to color zirconium dioxide into beads after it is fired but I would like to get more colors than just white and the high temperature black oxide. Can I mix other metal oxides to zirconium ...
Cara Loibl's user avatar
4 votes
1 answer
316 views

Nephelauxetic effect and covalency of metal-ligand bonds

As I was reading about nephelauxetic effects, which is the effect that atomic d-orbitals are bigger in a complex than in gaseous metal ions. The Racah interelectronic repulsion parameter gets smaller, ...
Mäßige's user avatar
  • 217
3 votes
1 answer
87 views

Can Silicon hinder the precipitation of AgCl?

In my lab, I am having trouble with getting correct silver percentages. For example, let's say a 99.99% silver sample. Digested in 10 mL of a 30% HNO3, fill up to 100 mL with DI, then concentrated (...
Matt's user avatar
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-2 votes
1 answer
77 views

Perfect amount of HCl to precipitate 1.000g of silver alloy

I am trying to figure out the perfect amount of HCl to drop silver out of a solution for a specific alloy. This alloy is 79.5% - 80.25 % Ag. We digest this (size of the sample is usually 1.000g or 0....
Matt's user avatar
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11 votes
0 answers
89 views

Is gallium slippery at room temperature in an inert atmosphere?

Ice is slippery when it isn't too far below it's melting point because the surface molecules are less loosely bound than the bulk and form a thin liquid layer. Pressure melting is a much smaller ...
Kevin Kostlan's user avatar
0 votes
0 answers
24 views

will adding metal nano particles to a CNT-polymer matrix increase the conductivity of the polymer?

I was wondering would just physical mixing of metal nano powders with MWCNT in a polymer matrix improve the conductivity of the said polymer? Would the metal particles interact with the CNT network. I ...
assasinchop7's user avatar
2 votes
0 answers
28 views

Conductive ink on silicon to bridge two isolated regions of the wafer

Can I use a thin layer of conductive ink on silicon to bridge two isolated regions of the wafer (p-type)? I know that using PVD methods would be the best option, but I don't have access to these ...
Flávio N. Lima's user avatar
-2 votes
2 answers
280 views

How to neutralize 60L of a 2% Aqua Regia with Various Metals suspended

I am encountering an issue in my laboratory. My supervisor and I are currently faced with the task of neutralizing a volume of 60 liters of Aqua Regia, which contains suspended metals, at a ...
Matt's user avatar
  • 31
5 votes
1 answer
632 views

Why I am unable to see any electrical conductivity in Permalloy nano powders?

We recently purchased some permalloy nano powders (Ni80Fe70Mo3) I checked the electrical conductivity of these powders using a multimeter which can measure resistance to the order of giga ohm's. I was ...
assasinchop7's user avatar
0 votes
1 answer
79 views

Malleability and Ductility Origins [closed]

Malleability and Ductility are both properties of metals. I have learnt that lead is malleable but not ductile. However, don't these properties both arise from metallic bonds? So how can a substance ...
Stark's user avatar
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-4 votes
1 answer
84 views

What is produced from chromium, HCL and NH3

I wanted to see if I could get a chromium salt from stainless steel, so I put the stainless steel in HCL, turning the liquid green. Then I mixed the result with ammonia, and a green solid precipitated ...
Edward Labadorf's user avatar
-1 votes
1 answer
325 views

Is water required for metal to rust, or is only oxygen necessary? [duplicate]

What causes rusting? Some sources say ferrous metals don't rust without being exposed to humidity or water, whole others say they do rust as long as there is oxygen present, just more slowly. Which is ...
Adam's user avatar
  • 19
1 vote
0 answers
59 views

Does anybody know anything about this patented, late-19th-century process for producing white lead?

I debated on whether to put this question in the History or Engineering Stack Exchange. Ultimately, I decided on the Engineering Stack because I believe the people on this site will understand the ...
Curious Layman's user avatar
1 vote
1 answer
82 views

What household objects are made of metals with a high degree of purity?

I've looked into this briefly and from what I've understood, the kind of copper that's used to make electric copper wire is generally of a high purity (well above 99%). What are some other household ...
SpotXSpot's user avatar
  • 113
1 vote
1 answer
52 views

what are other metal oxide that can be used as electron acceptors?

I am using silver oxide as a cathode because it's common. I was reading that " some solid metal oxides (e.g., silver oxide, lead dioxide, and manganese dioxide) possess high redox potentials. ...
Anwer Ak's user avatar
-4 votes
1 answer
68 views

Finding chromium

If I were to go back in time to pre-industrial Earth, and I wanted to make stainless steel, would there be a way to find chromium and/or chromite? It doesn't matter what chemical form the chromium ...
Jim Clay's user avatar
-2 votes
1 answer
67 views

Can ionic and/or metallic bonding produce stable long chains? Like polymers, though not necessarily as useful [closed]

Question Polymers are long chains ⛓️ of covalent bonds. Can similar structures exist for ionic and/or metallic bonding? They don't have to be as useful. I know there can be polymers with ionic bonds ...
Aseku Vena's user avatar
3 votes
0 answers
72 views

Why does gallium expand on solidification

I've heard that Ga exist as Ga2 molecules in its crystal lattice. Does that have anything to do with expansion of Ga while solidifying? Why and how does it actually expand?
Neet aspirant's user avatar
-5 votes
1 answer
177 views

Determine if particles are aluminium oxide

I am getting a white dust in my car, coming from the air vents and landing all over, mostly on the dashboard. After searching about this, it seems that it could be caused by the fins of the air ...
Magnus's user avatar
  • 109
4 votes
1 answer
208 views

Why does cold welding not work with carbon steels?

Cold welding is the process of joining metals using pristine surfaces without contaminents(oxide layers, oil, dust...) using pressure through atomic diffusion between the metal joints. Why does this ...
Andi Iacob's user avatar
19 votes
3 answers
4k views

Are salts (e.g. NaCl) soluble in liquid metals?

I'm curious whether any salt would at all dissolve in a liquid metal, such as gallium, mercury, or some other metal in the liquid phase? A Google search of "solubility of NaCl in Mercury" ...
Tom P's user avatar
  • 391
8 votes
1 answer
556 views

Why does zircon hate lead? How do these tiny crystals so effectively exclude lead atoms during formation enabling accurate uranium-lead (U-Pb) dating?

Background From the December 29, 2022 NPR article To peer into Earth's deep time, meet a hardy mineral known as the Time Lord: "(Zircons) are really the best markers of Earth's time, or the ...
uhoh's user avatar
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4 votes
0 answers
73 views

Why do vessels get a better shine when tea-leaves are soaked overnight in it before washing?

The other day I dumped consumed tea leaves into a brass utensil because I needed the tea-pan urgently. The vessel with the tea leaves didn't get around for cleaning until the next day. Ergo, the tea ...
Everyone's user avatar
  • 904
1 vote
0 answers
87 views

Removing Copper from drinking water by Electrolysis? What to keep in mind?

The drinking water in my flat contains a lot of copper. Although the amount of copper is around the allowed limit 2mg/l I would prefer to reduce it. I know that it is at this value from a paid ...
datenheim's user avatar
  • 192
4 votes
1 answer
275 views

Line Entry system like SMILES for metals?

SMILES is not designed for metallic compounds. Is there a similar ASCII line entry notation for metallic compounds, including repeating structure in space, &c.?
Sam's user avatar
  • 51
2 votes
1 answer
283 views

How easily should 304 stainless steel dissolve in a salt and hydrogen peroxide solution?

This is a simple question, although I don't have any exact numbers. I was looking to buy a food-safe stainless steel sieve, and one of the reviewers showed the sieve they purchased heavily rusted and &...
TLSO's user avatar
  • 147
5 votes
1 answer
265 views

The difference between Zn and Al on acid and base reaction

Because it was written on my textbook that Zn and Al dissolves in acid and alkali, I tried. When I put Al in NaOH solution it reacted immediately. But when I put Zn in the same concentration of NaOH ...
satoru kurita's user avatar
2 votes
2 answers
374 views

Why doesn't hydrochloric acid oxidize tin to tin(IV) chloride?

Diluted hydrochloric acid oxidizes tin to $\ce{Sn^2+}$ ion: $$\ce{Sn + HCl(aq) -> SnCl2(aq) + H2(g)}$$ Why is oxidation not complete? $\ce{Sn^4+}$ has closed shell and is more stable.
satoru kurita's user avatar
0 votes
2 answers
43 views

Can metals have both Fracture Toughness and Elasticity properties? [closed]

Fracture Toughness is the resistance of a material to cracking and Elasticity is the ability to bend without breaking. I want to know if there is any metal or metal alloy that can easily bend without ...
adrian bagherpour's user avatar
0 votes
0 answers
250 views

What do you think is happening to aluminium in salt water with rusted copper?

I put some aluminium foil and rusted copper(namely a Japanese 10 yen coin) in saturated NaCl solution. After some minutes tiny amount of small bubbles were observed on the surface of the foil. After ...
satoru kurita's user avatar
-1 votes
1 answer
350 views

How long does it take for zinc oxide powder and heinz vinegar to fully react into zinc acetate at a 1:2 ratio of zinc:heinz vinegar? [closed]

How long should I leave a solution of zinc oxide powder and heinz vinegar in order for it to react as completely as possible? The solution is 1(zinc oxide powder):2(heinz vinegar) in a glass flask. ...
tomatopies's user avatar
0 votes
0 answers
82 views

Separate aluminium from brass threaded bushing without affecting the brass

I wanted to separate aluminium from brass threaded bushing without affecting the brass. I also suppose that brass isn't the brass but it's a phosphor bronze. Does brass and phosphor bronze amalgamate ...
Malum Wolfram's user avatar
2 votes
0 answers
63 views

Can other metal salt compounds besides copper sulfate/zinc sulfate be used to create chlorophyllin? E.g. the magnesium center is replaced

There has been a lot of research done into sodium copper chlorophyllin. The synthesis is quite simple and can be done at home. It involves extracting the chlorophyll, saponifying the solution, adding ...
tomatopies's user avatar
0 votes
2 answers
493 views

Why is aluminum a less active metal than magnesium despite having a lower first ionization energy?

I was thinking about the general trend in metal activity (reactivity increases down a group and decreases across a period) when I started thinking about aluminum and how it has a lower first ...
Akash's user avatar
  • 335
0 votes
0 answers
384 views

Disposal of Metal Ion Solutions After Flame Test

I just bought a flame-test spectroscopy kit to use with our small homeschool group. It includes calcium chloride, potassium chloride, strontium chloride, and lithium chloride. I also bought a bottle ...
user480029's user avatar
6 votes
3 answers
2k views

Why are there so many metals in the periodic table?

Brief Background: I was studying about the 'classical electronic configuration' of the first 20 elements of the periodic table today and was bewildered by the fact that there are an equal number of ...
Chinmay Krishna's user avatar
0 votes
1 answer
53 views

NiCr wire and water

Suppose I'm a very impatient person and I want to heat up water by getting rid of the layer of isolation between a NiCr wire and the water (e.g. skinny-dipping). The idea is that, since the wires can ...
a concerned citizen's user avatar

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