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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Regenerating a Cobalt Acetate Catalyst

I have an eluent from an ion-exchange column containing Cobalt (II) ions and Chloride ions. In order for the cobalt catalyst to be recycled to the main process, it must be in its acetate form. Is ...
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1answer
581 views

Why does copper gain electrons in redox reactions, when it instead has a tendency to lose them? [closed]

Cu has tendency to lose electrons. But in some redox reactions, it gains 2 electrons and become neutral. Why is it so? How can it gain them?
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What is the product of magnesium reacting with carbon?

$$\ce{Mg + C -> X}$$ $$\ce{X + H2O -> Y}$$ Determine unknowns X and Y. Now the problem is I think the answer should be $\ce{X=MgC2}$ and $ \ce{Y=C2H2 + Mg(OH)2}$. But the given answer was ...
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2answers
4k views

Is PbO ionic compound?

In IIT-JAM 2018, There was one question, which one of the following oxides are ionic? There was one option PbO also. According to the official answer key, PbO isn't ionic. Although I know this ...
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1answer
260 views

Does 95.8% silver tarnish as fast 92.5% silver?

I've been trying to find out whether 95.8% (Britannia silver) would tarnish as fast as 92.5% (Sterling silver)? I haven't been able to find much on tarnish for Britannia silver. Given that both ...
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0answers
26 views

Relationship between Yield and Applied Potentials

This question revolves around this question from Atkins' Chemical Principles 5th ed., Chapter 13, Question 13.116: Consider the electroplating of a metal $+1$ cation from a solution of unknown ...
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1answer
776 views

Is it possible to have anions of metals? [duplicate]

I've been wondering if it is possible to have negatively charged metal ions. Most ions tend to have electron configuratons of noble gases. So then is it possible to obtain metal ions from metal atoms ...
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1answer
128 views

How to separate platinum from steel?

I'm currently extracting some platinum from an electrode. One part seems stuck in some way (possibly welded) to a piece of steel. I'm guessing it's steel because it's magnetic. I did a heat test on ...
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1answer
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How is aqua regia stored?

How is aqua regia stored as it dissolves all metals?
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Decomposition of LiNO3

I have a doubt about decomposition of alkali metals. Why does $\ce{LiNO3}$ decompose to give $\ce{Li2O}$ and $\ce{NO2}$ where as other alkali metals decompose to give corresponding nitrite and oxygen?
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Wade's rules applied to metallic elements

There are many examples of metallic clusters that distort from the structure predicted by Wade's rules to a more 'spherical', closo-like arrangement. For example, $\ce{Bi8^2+}$ is a square antiprism ...
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1answer
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Electrolytic refining of copper

In refining copper, an aqueous solution of copper(II) sulphate is electrolyzed, using impure copper as the anode and pure copper as the cathode. At the anode, metal impurities higher than copper in ...
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2answers
619 views

Stripping zinc electroplating with phosphoric acid - hydrogen danger?

I'll start by saying that I'm not a chemist, more of an artist. I'm stripping zinc electroplating from some regular hex bolts, nuts, and washers. I'm using a product called Ospho. It's basically ...
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1answer
2k views

Order of Solubility [duplicate]

Why solubility of alkaline earth metals decreases down the group? In my book, it is given that solubility of earth metals increases down the group $$\ce{BeSO4 > MgSO4 > CaSO4 > SrSO3 > ...
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753 views

Brass Instrument: Dezincification or just scrubbed off?

I do own a brass instrument (a trombone). The lacquer is damaged. I asked how to deal with it here. Now I learned that the brass contains zinc, and there is a corrosion process called "...
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1answer
335 views

Metallic Bonding

Since in metallic bonding, metals form ions and are surrounded by delocalized electrons, does that mean metal atoms always react in this ionised state? Can metal atoms lose valence electrons (like $\...
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216 views

Is brass combustible in high pressure oxygen environment?

Some metals are particularly ignitable in high pressure oxygen environments, like stainless steel and aluminum. Copper and nickel, on the other hand will self-extinguish when ignited. Does anyone know ...
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1answer
132 views

Ionic Compounds [closed]

Do elements share chemical or physical properties in an ionic compound? I mean if a metal would have an ionic compound with a nonmetal would the compound have physical properties of the metal and ...
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1answer
472 views

Osmium tetroxide reaction with cell membrane

Background: $\ce{OsO4}$ is a widely used staining agent used in transmission electron microscopy (TEM) to provide contrast to the image. In the staining of the plasma membrane, osmium(VIII) oxide ...
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1answer
57 views

questions for my 13 year old's STEM class. (Users of Potassium) [closed]

Would you please answer the following questions for my 13 year old girl's STEM class? Do you have a story about a time something went wrong using Potassium? What are some of the precautions you ...
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0answers
267 views

Can you heat Bismuth crystals to reset the oxide layer for new colors?

I'd like to get a bismuth crystal with small structures and deep blue colors for a ring I want to make. I can find these properties in different crystals online but never together. Can I just take a ...
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1answer
586 views

Why do some elements with high electronegativity exhibit metallic properties?

Metals typically have low electronegativity, which makes them form ions easily and prefer making metallic bonds to covalent. However, some of them seem to disprove that. Take, for example, gold, lead ...
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3answers
6k views

Solutions of Group 1 and Group 2 metals in Ammonia

When we add Group-1 and Group-2 metals to liquid ammonia, they dissolve to form metal cations and solvated electrons. $$\ce{M + NH3(liq) -> M+ + e-}$$ Now, when the G-1 solutions evaporate, we ...
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1answer
159 views

How to differentiate magnetite from metallic iron?

Both metallic iron and magnetite, $\ce{Fe3O4}$, are magnetic. Now, iron is grey in color, whereas hematite is black, so that they can be distinguished visually. Now, I have a powdery mixture of iron/...
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1answer
201 views

Salt Water Metal etching 50 (Euro-)Cent Coin

I want to etch the 50 Cent Euro Coin using this following technique that I came across on some DIY site: Immerse the coin and some disposable piece of metal in salt water such that they do not touch ...
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1answer
1k views

Sodium metal in acetone

When I place a chunk of 99,99% pure sodium metal in a beaker of (100% chemically pure) acetone, the sodium metal starts reacting and dissolving into the acetone and it forms a yellow/brown liquid. ...
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1answer
70 views

Why did my milled powders catch fire?

I milled a small amount of the sample ($75\%$ Al, $15\%$ Cu, $10\%$ Ni) mixed with toluene for 5 hours after which I set it on butter paper to dry. Then after 13 minutes I switched on the fan in the ...
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What is the most simple way to cut through a steel with very thin aluminum coating to obtain cross section without damaging the coating?

I needed to take cross section characterization of an aluminum coating. I tried to use a hand saw to cut through it, but it destroys the coating, and usually is separated with the substrate as I ...
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0answers
152 views

Problem in anode in experiment of electrolysis of brass

I am studying the electrolytic determination of copper content in brass (~58% copper, ~40% Zn and other trace elements) by using standard method BS EN 16117-1:2011. Now the electrode used for the ...
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1answer
2k views

What happens when aluminum reacts with tert butyl alcohol? [closed]

I wanted to know that what happens when aluminum reacts with tert butyl alcohol..?
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1answer
1k views

Reasons for solid or liquid soap

Soap is made by a saponification reaction, where a fat reacts with hydroxide ions to form a surfactant and glycerol. To make a solid soap $\ce{NaOH}$ is used, while $\ce{KOH}$ is used for liquid ...
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1answer
794 views

Water electrolysis - what is happening to an iron anode?

So I made an experiment to find a good electrolyte for a water electrolysis. I tried citric acid, which turned out to not produce any gases at the anode, I tried sodium hydroxide, which turned out to ...
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1answer
10k views

Reaction between magnesium metal and sodium hydroxide: Does this even happen?

Came across this question in a book: Among aluminum, zinc, tin and magnesium, which metals (if any) will react with an aqueous solution of sodium hydroxide to displace dihydrogen? The answer to ...
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1answer
59 views

Iron-platinum refining

If I have an iron-platinum alloy, can I put this into a solution of $\ce{HCl}$ to dissolve the iron, leaving a $\ce{Pt}$ precipitate? I know that Fe dissolves in $\ce{HCl}$ to form $\ce{FeCl2}$ and $\...
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1answer
5k views

Why is fluorine a gas, but lithium isn't?

$\ce{F2}$ is a gas, but pure lithium is a solid metal. Why is this? Lithium is much lighter, just 3 protons and 3.9 neutrons (average). Fluorine is much heaver, 9 protons and 10 neutrons.
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199 views

Why does a pickled gherkin glow only at one end when a current is passed through it?

I recently saw this Periodic Video. The Professor (Martin Polyakoff) notes that, The Gherkin normally glows only at one end due to excitation of $\ce{Na+}$ ions. The end which glows can either be ...
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0answers
170 views

Would a single atom of a metal bond with a plate of that metal?

A question purely for my own curiosity. I am trying to understand what "holds the atoms in a metal bar" in shape. A general question about metals, but let's use gold as an example. Under suitable ...
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1answer
1k views

How to think of solvated electrons?

This excellent answer explains at length what's happening in this fascinating video entitled Liquid Electrons - Periodic Table of Videos. In the screenshot below, the metallic-looking solvated ...
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1answer
109 views

For chemical reactions occurring in the interstellar medium, which involve metal-ions, will the metal ions be solvated or not?

Usually, metal-ions in terrestrial chemistry will be solvated - either by gas-phase solvent molecules or by liquid-phase solvent molecules. But the interstellar medium (ISM) is never in local ...
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0answers
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How can I identify corrosion products of steel using simple process?

As I am doing a research regarding corrosion, I immersed a steel in a salt solution. Different colors of corrosion products were produced as time passed. There are blackish, the usual red-brownish, ...
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2answers
273 views

Does a zinc metal coating react with coffee in a coffee grinder?

I'm restoring an old coffee grinder and I want to give the grinder mechanism a nice zinc / silver coating. But I read it is not safe for zinc to be in contact with acidic foods. When I look at the ...
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2answers
5k views

Does cold bluing steel prevent rust?

I've recently purchased a Damascus knife and am patiently awaiting it's arrival in the mail. I have been researching the potential care and maintenance habits for this craftsman blade, hoping to keep ...
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3answers
665 views

Can one turn a nickel blue?

I've heard of artificial coin toning, but haven't been able to find a recipe for creating a blue (or blue-ish) nickel coin. While not a metallurgist, I work with one. She tried nitric acid, which ...
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0answers
59 views

Corrosion issue at large DC current

I'm no expert in chemistry, but I know that corrosion can cause great problems in systems. I'm working on a prototype, and trying to figure out if corrosion will cause issues. The setup Imagine the ...
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1answer
91 views

What metal is under the stainless layer when it wears of?

I have this belt for several years now and the belt buckle is naturally subject to wear and tear. On the most exposed spots the outer layer is now completely worn of and I wonder Is this an example ...
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1answer
236 views

Will unused spare razor blades rust if stored for a long time?

I am considering purchasing 16 razor blade spares for a reduced price, but am unsure if they will be good as new if I were to use them several months from now. If left alone in the packaging (they ...
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1answer
69 views

Is this an aluminum screw dislocation?

Is this an aluminum screw dislocation? https://youtu.be/zbUPjHHml1E?t=55s I have heard of zinc pest which looks similar.
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2k views

How do foundries prevent zinc from boiling away when alloyed with Aluminum?

How do foundries prevent lower boiling point metals such as zinc from boiling away when alloyed in a furnace with higher boiling point metals such as aluminum?
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1answer
82 views

What research methods can I use in identifying Aluminum in a solid sample?

I do have a cube of solid aluminum. But I need to verify that it is really Al to validate my research. What simple scientific techniques do you recommend?
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1answer
44 views

Can I anodize an aluminum coating on steel to have better corrosion inhibition for the steel?

I am planning to coat aluminum on steel and I want to give the steel its maximum corrosion protection. Is anodizing the coating necessary?

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