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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25 views

Difference between heme and non-heme iron?

Lots of health websites talk about "heme" vs "non-heme" iron, claiming that the first is better absorbed by the body. But I can't find any sources that specify what these "types" of iron actually are, ...
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48 views

Why does the rusting process start from the bent/squeezed portion of iron?

I have noticed that the rusting of iron starts from the squeezed or bent parts of iron piece. I want to know what is the peculiar reason for the observation that rusting starts from bent or irregular ...
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How much oxygen is needed in the rusting of 1g of iron?

I’d like to find out how much oxygen is used in the rusting of 1g of iron. Here’s all I can manage myself: 4Fe + 3O2 → 2Fe2 O3 (rusting) n = m/M (mass, mole) nFe = 1/55,845 = 0,0179mol 4:3 = 1,33 (...
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28 views

Why is no metal hydroxide produced in metal-acid reactions? [closed]

I know that in metal-acid reactions we use diluted acid so it must contain a lot of water, why then is no metal hydroxide produced? I am a beginner, please make the answers as simple as possible.
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Reaction of hot sodium bicarbonate solution on aluminium foil

I was really curious about finding out how sodium bicarbonate reacts with aluminium metal. For this, I prepared a sodium bicarbonate solution and added a piece of aluminium foil to it. I scraped the ...
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Inorganic Chemistry: atomic metal radius and coordination number

On the book "Atkins - Inorganic Chemistry" there is this table: So, if the Molybdenum has an atomic radius equal to 145 pm and this primitive cell is a body-centered cubic lattice (CN = 8), to know ...
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Is fluorinated steel corrosion resistant from normal oxidation?

I've recently learned of a compound named Chlorine trifluoride a powerful fluorinating agent. The common way to store it seems to be in regular steel drums where it flash oxidizes the inside of the ...
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1answer
41 views

Need of refining aluminium and Hoope vs Hall–Héroult processes

Recently I was taught how aluminium is commercially extracted. The ore is first concentrated by leaching either by Bayer's process for red bauxite (impurity: $\ce{Fe2O3}$) or by Serpeck's process for ...
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1answer
33 views

Why is the cathode of a lithium-ion battery metallic, which is the opposite of most other batteries? [closed]

In most types of batteries, primary and secondary, the metallic electrode is the anode, and a non-metal acts as cathode. Or a pure metal is the anode, and the cathode is a metal oxide. Why is the ...
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1answer
71 views

Aluminium Oxide as Dehydrating agent

According to this paper on dehydration by $\ce{Al2O3}$, Dehydroxylation causes a surface defects as Lewis acidic centers (unsaturated $\ce{Al^3+}$ ions) and basic Lewis centers ($\ce{O^2-}$ ions) ...
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Dissolving plastic resin without damaging aluminium surface

I have an aluminium surface covered with some plastic, which I intend to dissolve in order to clean the surface. On the note for the plastic I have applied, it says that it contains the following: 2-...
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2answers
71 views

Obtaining mercury from mercury(II) nitrate

I was thinking about obtaining mercury from mercury(II) nitrate. Is it possible? I've tried putting chunks of Fe into it, I've got the logic from the voltaic table (where Fe is on the left side of Hg, ...
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1answer
58 views

Why does the displacement reaction of zinc in copper(II) sulfate solution result in dark metallic copper?

It is commonly known that when zinc metal is placed in a solution of copper(II) sulfate, a displacement reaction occurs, and elemental copper is deposited onto the decomposing zinc metal. A practical ...
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1answer
52 views

Metal nail reaction in wall filler

Please help explain what is happening to this nail. It has been in this wall filler for a good few months. The substance being excreted was rising up forming these stalagmites, with a liquid forming ...
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1answer
48 views

Gallium makes aluminum soft like a wet tissue. Any other metals or alloys that are vulnerable to similar damage? [closed]

Gallium can make aluminum soft and brittle as long as it bypasses the aluminum oxide normally formed on the surface of the aluminum (for example by scratching the surface). Mercury can weaken ...
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26 views

Using MP-AES, can I accurately say I've found a metal concentration on one wavelength and not another?

I've been given the opportunity to use an MP-AES for metal detection. I'm testing traces of metals in plants. The plant matter is digested so I have a liquid solution, I expect there to be a lot of ...
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12 views

Diferent Sacrificial Anodes Duration

Zinc, magnesium and alluminium are the common anodes, there are all diferent. Ones more reactive than the other, which is why some are more effective in salt water. Salt water is a better conductor to ...
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63 views

What is the physical meaning of the statements like “weight percentage of FeO in Fe”? [closed]

I have always had the notion of calculating weight percentage of Fe in FeO. It always seems that we are to calculate at times the weight percentage of FeO in Fe.Particularly when one weight percentage ...
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120 views

Is it safe to boil water in a foil pan on an electric burner?

Is it safe to boil water in a foil pan on an electric burner? Can the metal leach into the water? I've heard some reports recently about avoiding aluminum foil due to it leaching into food. Photos ...
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34 views

However what is so acidic about CaO and basic(no pun intended) about SiO2 while calculating basicity of slag?

I have seen Basicity to be calculated as $\mathrm{B} = wt\%\:\ce{CaO}/wt\%\:\ce{SiO2}$ particularly in slag bascity/acidity calcuations. Now I do not think that $\ce{CaO}$ is the most basic oxide that ...
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1answer
84 views

Why do we use coke instead of coal in order to reduce FeO as basic reaction in ironmaking process?

Why is coke used as a reducing agent to reduce FeO to produce iron instead of coal.I admit that coke is carbonaceous but what is it that compels us to use coke instead of the naturally available coal?
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194 views

Gold Plating on Glass?

I am considering labware options to handle NaOH solutions at ~150°C. One appealing idea would be to coat my current glassware with gold. I've read different sources mentioning the possibility without ...
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67 views

The phlogiston theory [closed]

I have looked this theory up on google and found that the theory is that when metal is burnt calx (metal oxide) and phlogiston is created (metal --> calx + phlogiston). Then I found out that ...
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2answers
959 views

What is the most convenient way to prepare ferrous oxide (FeO) in the laboratory?

The Wikipedia page for ferrous oxide states that $\ce{FeO}$ can be prepared by the thermal decomposition of iron(II) oxalate, with the following reaction: $$\ce{FeC2O4 → FeO + CO2 + CO}$$ And that ...
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1answer
75 views

What kind of metal drums are used to store Hydrochloric Acid?

I would expect Hydrochloric Acid to be stored exclusively in glass or plastic containers, but I was surprised to find Honeywell offers it for sale in 30Kg metal drums (Link). I think Hydrochloric ...
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1answer
110 views

Why is a TTT diagram called isothermal transformation diagram?

Why are TTT diagrams called isothermal temperature diagram?As far as I know the temperature variation is plotted with the variation of time in a TTT diagram. Then why do we call it "isothermal".What ...
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62 views

How to determine the solubility of a Metal Fluoride in liquid Gallium

How do I determine if a Metal Fluoride is soluble in liquid Gallium and under what conditions the Metal Fluoride will stay in solution in the liquid Gallium? I am involved in a project that is ...
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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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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
196 views

Which metal ions precipitate in NH4OH? [closed]

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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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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23 views

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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3answers
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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
90 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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2answers
125 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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1answer
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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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3answers
740 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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52 views

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
251 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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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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1answer
125 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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396 views

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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77 views

Nanocar racing competition and the race tracks used

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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178 views

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
42 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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149 views

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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56 views

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 ...