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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23 views

Speeding up the rusting/oxidation process of various metals using ferric chloride? [on hold]

So I have ferric chloride etching solution here is the datasheet for the product I have: https://download.altronics.com.au/files/datasheets_H0800D.pdf I have 4 types of metal; stainless steel metal, ...
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Anodization Titanium current vs voltage

I am fairly new to anodization of Titanium. It concerns anodization using oxalic acid with the sole purpose of coloring Titanium grade 2 parts (= type III?). After some research online, I found a lot ...
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14 views

Can a Titanium Grade 5 alloy produced by SLM have greater 'surface area' exposed?

I was doing an electrochemical test (LPR) and Titanium Grade 5 produced by AM respassivated oxide layer faster than the specimen produced with traditional manufacturing under identical experimental ...
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1answer
68 views

Which metal ions precipitate in NH4OH?

From Wikipedia-1, and from an answer here on Stack-Exchange, I can list at least the following elements which will dissolve in aqueous $\ce{NH4OH}$: $\ce{Cr(III), Co(III), Ni(II), Cu(I, II), Zn(II), ...
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Factors that influence the electrical conductivity of metals

The electrical conductivity of metals is a physical property of these materials. Much of the theory used to explain the electrical conductivity of metals is also based on physics understanding. ...
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31 views

How can I calculate the equilibrium of a reduction reaction? [closed]

I'd like to calculate the equilibrium in reducing the metal in a salt with a more reactive metal, e.g. $$\ce{HgSO4 + Pb → Hg + PbSO4}$$ Which as a side note, I know can only happen at low ...
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Does tantalum and tungsten really not form amalgams?

User @Poutnik has recently answered two questions(here and here) in which he/she quoted this statement from Wikipedia: Almost all metals can form amalgams with mercury, the notable exceptions ...
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Why is it important to know the spin of bioinorganic complexes?

During a bioinorganic chemistry course, my teacher gives a lot of importance to spin states of metal ions and how they changes (or not) after the formation of a complex. For example, when hemoglobin'...
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Other than CO2 release, what are the disadvantages of precipitating metal carbonates using NaHCO3 instead of Na2CO3?

Be, Mg, Ba, Zn, Ni, Ca, Cu, Fe, Mn, Cd, Pb, Hg, Al carbonate salts are all insoluble. I (perhaps naïvely) believe that I could precipitate carbonates from those mixing a soluble salts of these (e.g. ...
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Where can I find the solubility values of As, Al, Sr, Sb, Ti, and Cr Oxalates in aqueous medium?

Wikipedia doesn't have a reference for the compounds... I'm also looking at least one value around 20C, but across -50-100C would be great.
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How is hair tissue mineral analysis performed?

This might be a mixed chemistry / physics question, but I've always wondered what methods were used to precisely determine the levels down to trace amounts of all minerals in human tissues. I know ...
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1answer
41 views

Band MO of Sodium Filling of electrons confusion

I wanted to ask a question about metallic bond - band electron theory. Consider the diagram of Sodium below: Circled are orbitals both containing $2$ electrons each which combine using LCAO to give ...
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112 views

How do metals split the oxygen double bond during corrosion?

For a metal like $\ce{Mg}$ to corrode into $\ce{MgO}$, the double bond in $\ce{O2}$ must break. Since the dissociation energy of $\ce{O2}$ is 500 kJ/mol, using estimates from the Boltzmann ...
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What's the densest alkali metal?

This was asked in a school exam of mine, GCSE curriculum, exactly as it was worded on the title. I found this question a bit vague, and answered it francium, however of course francium is just an ...
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663 views

Is there a method to separate iron from mercury?

The mercury is contaminated with iron. Is there any way to remove iron from mercury?
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Explanation of metallic crystal structures using orbitals and electron configuration

There has to be a direct relation between metallic crystal structure formation and electrons in orbitals. For instance, we know that Fe2+ forms body centered cubic or bcc structure with the ...
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1answer
241 views

What would happen if I combined this polymer and this metal (assuming I can) [closed]

So let me explain, I recently found out about a material called sorbothane (which is a polymer). Now, sorbothane is special because not only does it highly efficiently absorb shock, but also highly ...
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9 views

Deposition of Nb on SiO2 wafer (Z-Cut)

I am trying to sputter $\ce{Nb}$ on $\ce{SiO2}$ Z-Cut wafers (quartz crystal). I was wondering if $\ce{Nb}$ will stick well to the surface of the wafer. I've routinely deposited $\ce{Nb}$ on $\ce{...
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60 views

Why do metals form cations?

metals that have a low number of occupied shells such as lithium and potassium should have a stronger electrostatic attraction to their nuclei, so what causes them to always lose their electrons ...
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Disproportionation of Au(II)

Cu(II) and Ag(II) complexes are known to exist while Au(II) is unstable and disproportionates to Au(I) and Au(III). My guess as to possible reasons to this effect is that Au(II) like Cu(II) and Ag(II)...
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30 views

Properties of Nanocar racetracks

In the Nanocar race competition the molecules are raced on a gold surface. Is there a specific property of gold that it forms a good "racetrack"? On what criteria does it compare with other metal ...
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Brass - is this corrosion or oxidation and why did it happen?

I have bought a new brass Y-split water valve which is plain brass but inside is a more polished one, it was packed nicely and I opened it 2 days ago, washed it off with water for some reason, then ...
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1answer
39 views

What are we seeing in this AC salt-water copper-wire experiment?

There's a highly watched video on YouTube by "ElectroBoom" on the effects of passing AC (not DC) current through salt water. The water gets cloudy and at the end of the video we can see one of the ...
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Why does copper jewelry & wire smell bad - even when I'm not wearing it?

I make jewelry by weaving a frame from copper wire for a gemstone, then making copper coils or spirals, etc for further decoration. Even 'on the roll', the copper wire smells bad - and the smell ...
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Can gold cause tin or other metals to corrode?

I stumbled upon the following article while trying to identify some old RAM modules: https://www.techrepublic.com/article/quickly-identify-ram-chips-with-these-tips/ In the article, it mentions the ...
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2answers
75 views

Low-cost nontoxic corrosion inhibitor for steel exposed to hydrochloric acid

It seems that many commercial descaling solutions designed to remove scale (calcium carbonates, etc that form on water heaters) are a simple combination of an acid and an acid corrosion inhibitor for ...
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When burning Metal Salts such as Lithium Chloride is the emission toxic? [closed]

I'm completely new; Just thought this was the place to ask.
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Flame Test Spectrograms Not Lining Up With Reality

In my AS Level chemistry class we had tried some DIY spectroscopy of flame tests with the aim of identifying anions in certain salts. We got as far as building the spectrometer inspired by Paper Craft ...
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1answer
308 views

Why do the f-block elements ( inner transition metals) have an oxidation number of +3? [closed]

The f-block valence electrons understandably include the outermost two from 6s. But why do the f-block elements have an oxidation number of +3, pulling an electron from an inner shell, not even a d-...
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1answer
34 views

How is traditional thermite powder stored such that it doesn’t corrode?

I watched some guy talk about redox reactions. Then he was going to do the good old thermite demonstration. He just had a bottle of thermite mixture. I’m wondering, why didn’t it have a chance to ...
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26 views

Metal colored flame and safety

For Chrismtas I was a given a wonderful gas lighter, that produced a pink flame by heating small metal pads (when the pads are cold, the flame is blue, once they are red hot, the flame is colored). ...
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769 views

What is the black slag formed when sterling silver is melted with borax? [Edited with images]

What is the black graphite looking slag that is formed when sterling silver is melted with borax? Is there a way to remove it from the surface of the sterling silver? It appears to be indestructible!...
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1answer
71 views

Is the flint used in disposable lighters toxic?

Especially the sparks that result when using them. I heard this from a friend and can't seem to find an answer on Google.
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Gaseous metals?

Metals form metallic bonds which explain many of their chemical and physical properties. This is most familiar in the solid state but metallic properties are still quite recognizable in the liquid ...
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2answers
71 views

nickel-copper fabric: shielding viability after being subjected to weathering

I know the solution can be as simple as a well-sealed garbage can, but I am contemplating making a more malleable fabric based faraday-cage-esque contraption. The plan is to use nickle-copper fabric ...
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1answer
101 views

The test of metal hydroxides and metal oxides

Is testing metal oxide different from testing metal hydroxide using a litmus paper?
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212 views

What happened to this stainless steel tool when exposed to vinegar?

Based on an article I found online about how to disinfect hygiene tools I've been soaking nail clippers and similar items in a mixture of white vinegar, dish soap, and warm water for a few hours in a ...
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Gallium - Practical use to remove aluminium

Would gallium pass through aluminium into steel? The situation is two joined pieces of metal. Gallium could be applied to the aluminium to degrade it, for mechanical removal, but would it pass ...
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1answer
71 views

It is possible to create any metal? [duplicate]

This question just popped up in head. There are many things which we are good at. We are good at: constructions. build stuff. destroying things. repairing things. cleaning. But I want also to know, ...
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1answer
65 views

Aluminum and aluminum oxide

I have a new grain mill that I am hesitant to use because the rollers are anodized aluminum. As I understand it the anodized aluminum is actually aluminum oxide and supposedly non-toxic. I realize ...
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2answers
51 views

Materials used in cooktop heating element, and reason for black appearance

I have been interested in the structure of heating elements/coils used in cooktops. I am referring to something such as in the following picture: I have a cooktop at home with such elements, and at ...
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2answers
109 views

How does Nickel harden steel?

Nickel : Does not harden austenitic stainless steel Ease the tempering of martensitic stainless steel Harden maraging steel by forming precipitates I also read people saying that it harden ferritic ...
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1answer
99 views

Recover Solder (Sn-Pb) from wires

I have began to do an "art project" which utilizes solder as main material. While I know that solder is cheap and easily found in multiple shops, I have set my mind on using recycled solder from out ...
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259 views

What bonding allows chloroaluminate (AlCl4-) to form?

How is $\ce{AlCl4-}$ formed when $\ce{Al}$ only has $3$ electrons in it's outershell. It would be able to give $3$ electrons away with $\ce{AlCl3}$ for it to have a full outershell but how does it ...
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119 views

Effect of oxidation aluminium reflectivity

Aluminium is a fairly good reflector, but oxidation will reduce it's optical reflective properties. Aluminium is used for reflectors either being deposited on a substrate, or polished and protected ...
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1answer
105 views

What metals have been used in photography?

I'm interested in knowing about the various processes that have been used in chemical photography. As I understand it, most are based on silver. Are there any major ones which have not used silver? ...
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1answer
202 views

How to safely clean tantalum jewelry

I have some tantalum jewelry that I would like to clean. I've tried just soap and water to no success, so I wanted to try one of the standard at-home cleaning methods, like this one that uses foil, ...
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Is it environmental to throw ordinary keys in the regular household trash?

I have several keys on my chain that I do not need any more, so I'm thinking about throwing them away, but I'm not sure if it is okay to throw away in the regular household trash. I looked it up to ...
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119 views

Thermal Conductivity of Calcium Carbonate?

Is Calcium Carbonate (Group 1 and 2) able to conduct heat more than other carbonate (Transition metal) allowing for them to be decomposed faster. The reason I am asking this question is because my ...
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1answer
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Regarding interaction with metal sword and white gas

I have a large sword that is comprised of over 1000 layers of Titanium and High Carbon Steel. I wrapped it in Kevlar Wick and I set it on fire using Coleman White Gas (Camp Fuel) for performances. ...