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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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 ...
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Making bronze colored Solder
Is it possible to make a bronze/brass colored solder that melts at the same temperature as regular 60-40, or a bit lower?
And how would you do that if you have a crucible and an oxy-acetyline torch
Z
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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 ...
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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 ...
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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, ...
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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 (...
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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....
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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Can ionic and/or metallic bonding produce stable long chains? Like polymers, though not necessarily as useful [closed]
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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 ...
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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?
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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 ...
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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 ...
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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" ...
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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 ...
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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 ...
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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 ...
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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.?
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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 &...
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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 ...
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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.
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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 ...
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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What drives double displacement reactions?
I have two questions:
I understand that in a displacement reaction the more reactive element displace the less reactive element. But why? In the reaction with Zinc and Copper Sulfate, we form Copper ...
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What are good ways to anticipate co-crystalization of different metal ions?
What rationale (purely theoretical/assumptive, or known by experience / backed by evidence) would you use in an attempt to effectively anticipate which other metal or elemental ions are most likely to ...
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Best material selection for a component containing hot saturated-level saline water with high chloride content (Polymer vs coated metal)
I have a component (Which can be seen as the attached file)
and inside the component, there would be hot saturated-level saline water with high chloride content (Not shown)
Considerations:
The ...
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Increasing the weight in metal with salt? [closed]
Is it possible to increase the weight in metal (such as bronze) by exposing it, or soaking it in salt?
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What is the mechanism of sodium reacting with water vapor?
We all know that
$$\ce{2Na +2H2O(g)->2NaOH +H2}$$
The question is:
What is the mechanism (not the reason that sodium is more 'electropositive' or more reactive than hydrogen, as in this question; ...
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What metals are safe to use as electrodes when doing electrolysis of water (I am trying to produce hydrogen gas)
I am going to be a DC power converter (with fairly high voltage and amps) to turn water into hydrogen (and oxygen) gases. However I have a few questions about the safety of this process.
What ...
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Balanced reaction to Cr given H+ [closed]
The troublesome nature of this post, is that I was given very little information to work with:
"The metal chromium (Cr) reacts with an acid, to create Cr^+3 ions, and hydrogen gas.
Show the ...
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Is there an acid (or other solvent) that dissolves nickel but not brass?
Preferrably one that is common or easy to make using common chemicals.
My application is to remove nickel plating from brass parts. Right now the best solution I have is to scrape and chip it off, but ...
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What theory accurately explains metallic bonding in beryllium?
Since beryllium is an alkaline earth metal, the bonds between beryllium atoms could be considered metallic and we can use molecular orbital theory (MOT) to explain metallic bonds in metals.
Consider ...
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How to find out by what method the steel was made, having a microstructure?
I know that rolled steel will have grains elongated in the rolling direction and I don't see anything similar in the microstructures of these steels. If I'm not mistaken, then the irregular boundaries ...
