Questions tagged [oxides]

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Alkali-rich lead glass with working range at room temperature

I understand that the glass transition temperature (above which it is considered a super-cooled liquid) is quite far below the liquidus of the corresponding crystalline mixture. In the paper, "...
user145034's user avatar
-2 votes
1 answer
42 views

Why mono and dioxides of germanium,tin and lead are amphoteric

I get that group 14 elements show +4 and +2 oxidation states so they can form both ionic and covalent compounds and so they are amphoteric but monoxide means that these elements have to show +2 ...
Tabi Khan's user avatar
-1 votes
2 answers
564 views

Why iron reacts with steam to give Fe3O4 not Fe2O3? [duplicate]

Why $\ce{Fe}$ with $\ce{H2O}$ gives $\ce{Fe3O4}$ not $\ce{Fe2O3}$? Like, $\ce{Zn + H2O \rightarrow ZnO + H2}$, why $\ce{Fe}$ doesn't simply gives $\ce{Fe2O3}$ when it reacts with steam?
O M's user avatar
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1 vote
0 answers
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What chemical species is really acting as oxidizer in hot concentrated sulfuric acid [duplicate]

In some japanese website it is written that hot conc sulfuric acid has greater oxidation power than that of normal temperature since it contains sulfur trioxide formed by decomposition of the sulfuric ...
satoru kurita's user avatar
5 votes
1 answer
312 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
1 vote
1 answer
124 views

Bond order of carbon monoxide and nitrosyl cation

The following question was asked in JEE Mains exam in 2022, a competitive exam for engineering in India. The difference between bond order of CO and NO$^+$ is $\frac{x}{2}$ where $x$ = ____. (Round ...
Bongo Man's user avatar
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-6 votes
2 answers
151 views

Besides diamonds, are there any stones without oxygen in composition? [closed]

In my inpression, the most of stones are oxides and hydroxides, correct me if I am wrong.
Anixx's user avatar
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-2 votes
1 answer
61 views

Does this reaction that make an Alum happen?

One day I asked a question in high school. The problem is “Show the reaction that occurs when potassium permanganate is added to dilute sulfuric ferrous sulfateⅡ. The answer is $\ce{2KMnO4 + 8H2SO4 + ...
Taro's user avatar
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-1 votes
1 answer
54 views

Is it necessary criteria that we draw Ellingham diagram for only one mole of oxygen consumed for a given reaction

In my textbook and many other reference text shows Ellingham diagram for only one mole oxygen consumed. Why is this done?
Kumar Priyanshu's user avatar
1 vote
1 answer
49 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
-5 votes
1 answer
138 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
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2 votes
1 answer
84 views

Reaction between iron oxide and metallic zinc or aluminum at 500C

High temperature corrosion of iron occurs on passenger automobiles in areas such as exhaust headers, pipes and bolts that reach temperatures of about 500°C. The iron is in the form of steel or ...
Jon Jaroker's user avatar
9 votes
3 answers
1k views

At what temperature does Brass blacken in air?

A machine has overheated in an air filled enclosure, and a major brass component of mass around 1kg turned black. It was probably not in the high temperature regime for more than 2 hours at a guess ...
Dirk Bruere's user avatar
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1 vote
0 answers
100 views

Could a beach have green or blue sand due to a nearby copper deposit? How poisonous would such a beach be? [closed]

I am in the midst of a world building project and am wondering about green sand from copper oxide/patina material. The material could either be washed into the water from a nearby land deposit or be ...
Lynx's user avatar
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0 answers
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Air purifier: What is the reaction mechanism between HCHO and negative oxygen ion

Multiple government and commercial sources claim that the negative oxygen ion generated by air purifier can reduce HCHO concentration. However, on google scholar, I find neither the reaction formula ...
dodo's user avatar
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5 votes
1 answer
252 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
6 votes
1 answer
383 views

Is it appropriate to call an element an amphoteric substance?

In most of Japanese high-school textbook it is written that Al,Zn,Sn and Pb are amphoteric element(in Japanese 両性元素)because they react both with strong acid and base. For example Al reacts like below. ...
satoru kurita's user avatar
5 votes
0 answers
161 views

Does chromium(III) oxide react with or dissolve in liquid sulfur dioxide?

Liquid $\ce{SO2}$ (b.p. −10 °C) is known as a versatile solvent (yet not particularly pleasant to work with) for a wide range of organic and inorganic compounds having limited solubility in ...
andselisk's user avatar
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6 votes
1 answer
457 views

Can uranium be used to color aluminium oxide based gemstones, and/or diamonds?

Re-hosting this question from Physics to Chemistry, lightly edited. Rubies and sapphires are chemically equivalent to the mineral corundum, with the exception of transition metal impurities that ...
jpt4's user avatar
  • 69
3 votes
1 answer
468 views

Is sodium superoxide more abundant than sodium oxide?

Reference(NCERT book of India); My professor has taught me that $\ce{Na2O}$ and $\ce{Na2O2}$ are the most common oxides of sodium, but in my reference book it is written that they are $\ce{NaO2}$ and ...
user avatar
-1 votes
1 answer
735 views

How can one change the color of Iron Oxide by changing the composition or hydration?

How does the color of rust change depending on its makeup and state, or more to the point, how would one put the rust into that state? For example, Wikipedia shows Iron(III) Oxide as being red in the ...
JShoe's user avatar
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-1 votes
1 answer
63 views

What role does ammonium play in the explosion of ammonium nitrate? [duplicate]

I read that ammonium is the "fuel" and nitrate is the "oxidizer". The nitrate oxidizes because it's a nitro group, but what's the mechanism of the ammonium?
Bob Stephens's user avatar
0 votes
0 answers
61 views

Metal oxide formation minimum temperature?

Is there such thing as minimum temperature for creation of metal oxide? Let's say a highly reactive metal, lithium, comes into contact with solid oxygen at a cryogenic temperature of 20 Kelvin, would ...
Soliton's user avatar
  • 25
-3 votes
2 answers
253 views

What can be used instead of magnesium to make silicon from sand (in lab)? [closed]

I found this post talking about making silicon from sand. They mixed magnesium with sand and then burn them then it create silicon and magnesium oxide. And my question is what can we use instead of ...
raspiduino's user avatar
1 vote
0 answers
104 views

Why do many p-block dioxide gases dissolve in water to form acids?

I find that many gases of the form $\ce{MO_2}$ like $\ce{SO2}$ , $\ce{CO2}$ and $\ce{NO2}$ dissolve in water to form acids. This observation has many different practical implications, for example, it ...
tryst with freedom's user avatar
1 vote
2 answers
501 views

How can I make cerium(IV) chloride? [closed]

How can I make CeCl4? I have some ideas but am worried I'm going to mess it up since this is the first time I've worked with lanthanides.
Forgetful Chemist's user avatar
2 votes
1 answer
89 views

Can nitric oxide (NO) reduce xenon fluorides

I came across the following question: $\ce{XeF4}$ on reaction with gaseous nitric oxide forms xenon gas and (P). Find the total number of lone pairs present in one molecule of P. As far as xenon ...
Ammaarah Fatima's user avatar
1 vote
1 answer
49 views

What is the effect of H2O2 on SPIONs?

I have a system contains super paramagnetic iron oxide nanoparticles (SPIONs) either Fe3+ or Fe2+. I need to introduce hydrogen peroxide to the system but i am not sure about its effect to the SPIONs ...
John Miller's user avatar
5 votes
1 answer
155 views

What is/was "uraneous oxide"? Was it an accepted name for a compound or mixed oxides of uranium?

In This National Technical Reports Library page for a 1965 report Method for Coating Actinide Particles in the list of keywords both Uranium compounds and Uraneous oxide are listed. But I don't find ...
uhoh's user avatar
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11 votes
1 answer
443 views

Why does radium form a nitride rather than oxide when exposed to air?

The Wikipedia article states: Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) on exposure to air, forming a black surface layer of radium nitride ($\ce{Ra3N2}$)....
Petr's user avatar
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3 votes
0 answers
126 views

Oxidising power of oxides of 15th group elements [closed]

In case of oxides of 15th group elements in form of $\ce{M2O3}$ ($\ce{M}$ is the 15th group element), does oxidising power of oxides increase or decrease down the group? I tried to check by comparing ...
ROHIN PRABHU's user avatar
2 votes
1 answer
490 views

How thick is the colored oxide layer on heat treated stainless steel? [closed]

When stainless steel is welded, or just heat treated, it will develop a thicker oxide layer, which in some cases is is rainbow colored, but can become so thick as to appear almost black. From the ...
James Gaidis's user avatar
-3 votes
1 answer
265 views

Explanation of rusting of iron through metallic bonding [closed]

In the diagram , colour representations : [O - oxygen atoms , red dots - electron ] I will explain rusting of iron due to metallic bonding as I have understood from online. Please correct me if I’m ...
S.M.T's user avatar
  • 421
14 votes
1 answer
3k views

Why do only some metals make protective oxide layers?

Almost all Alkali metals and Alkaline Earth metals react with air to form their respective oxides, but why does only Magnesium forms a protective oxide layer? What properties of magnesium oxide allow ...
Chaitanya Garg's user avatar
0 votes
0 answers
96 views

Comparison between bond length of platinum and titanium oxides

This question comes from a problem sheet I recently had. It concerns the fact that Pt-O bond lengths are typically longer than Ti-O ones, even though the radii of the two metals are similar. My ...
7daiss's user avatar
  • 93
0 votes
1 answer
140 views

Ascorbic acid and aldehydes: Reaction and Influencing Metals

I've researched online and I've read that ascorbic acid can both promote oxidation and reduction depending on the conditions (I've read about trace metals but I've never found which metals affect its ...
Hans's user avatar
  • 1,097
1 vote
1 answer
423 views

MgO as food supplement - solubility in water

A number of magnesium food / sports supplements contain it as MgO - which is practically unsoluble in water. The recommended quantity is somewhere around .3g / day, so not an insignificant amount. How ...
Zubo's user avatar
  • 1,210
1 vote
1 answer
60 views

Do antimicrobial abilities of copper boilers decrease over time?

As copper boilers age and develop oxide buildup, does this lessen the copper's antimicrobial abilities in killing bacteria? I was thinking since that coating would be on the copper, there would be ...
dman's user avatar
  • 159
0 votes
1 answer
468 views

Is the lattice point in ZnO crystal structure occupied by the molecule ZnO or the ion O^2-/Zn^2+?

I learnt that ZnO has a hexagonal crystal system. I was expecting that cations or anions would occupy the lattice points in hcp while voids would be occupied by anions or cations respectively. But ...
R. Anusha's user avatar
  • 181
0 votes
0 answers
31 views

When MnO2 acts as a catalyst to speed up the decomposition of H2O2 what does it actually do? [duplicate]

Everywhere I look it just states that $\ce{MnO2}$ acts as a catalyst but I have yet to find a simple explanation for what it actually does. What is the mechanism involved in simple terms?
Kantura's user avatar
  • 709
1 vote
3 answers
694 views

What does *oxidizing* have to do with *hydrogen*? [closed]

An oxidizing acid is a Brønsted acid that is a strong oxidizing agent. All Brønsted acids can act as oxidizing agents, because the acidic proton can be reduced to hydrogen gas. (source: Wikipedia) ...
voices's user avatar
  • 159
8 votes
2 answers
882 views

Molecular structure of iodine nonoxide

A question in an exam was as follows: Iodine reacts with ozone gas to form a dark yellow solid $\ce{X}.$ Let the number of lone pair of electrons in un-ionised form of $\ce{X}$ be $m,$ number of lone ...
Safdar Faisal's user avatar
3 votes
2 answers
355 views

Why and how is rust forming on moon?

note: @Mithron's proposed duplicate Why can't rust form without water? does not have anything about the conditions on the Moon, so no, it's not a duplicate. Several popular news articles mention ...
uhoh's user avatar
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0 votes
1 answer
2k views

Reaction (or lack thereof) between oxygen and halogen gas

I understand that oxygen and halogens are both very electronegative elements and it would makes sense that they don't want to associate with each other at all. However, I know that oxides of halogens (...
chematwork's user avatar
4 votes
2 answers
514 views

Lewis structure of dinitrogen trioxide

I have a confusion related to the structure of $\ce{N2O3}.$ I was taught 1 is the correct one, but I believe 2 is better since it has no formal charge on it. Why is 1 correct and 2 wrong?
Rasputin's user avatar
  • 107
2 votes
1 answer
2k views

Why is phosphorous pentoxide a dehydrating agent?

$$\ce{HNO3 + P2O5 -> 2HPO3 + N2O5}$$ In this reaction, both nitrogen and phosphorus have the same oxidation number before and after the product is formed. Since the $+5$ oxidation of nitrogen is ...
R. Anusha's user avatar
  • 181
1 vote
1 answer
2k views

Reaction of Silicon Dioxide with Hydrofluoric Acid [duplicate]

I learnt that $\ce{SiO2}$(Silicon dioxide) doesn't react with any acid except $\ce{HF}$. So what is special about $\ce{HF}$? Why does only $\ce{HF}$ reacts with $\ce{SiO2}$ even though $\ce{HF}$ has a ...
R. Anusha's user avatar
  • 181
2 votes
0 answers
43 views

Liquid storage of transition metal oxides?

Transition metal oxides (TMOs) have a lot of interesting properties, from ferroelectricity to battery applications. Often times you can change the properties with only slight changes of oxygen ...
user157879's user avatar
0 votes
1 answer
269 views

Silver "polish" with aluminum foil left a hard yellow coat [closed]

I cleaned my silver teapot with the aluminum foil-baking soda-hot water method. Usually this works well on my silver plated flatware. However, this time it left a hard yellowish coating. I was only ...
Margaret McLane's user avatar
-1 votes
1 answer
995 views

Iron and copper oxide for thermite

I recently successfully made thermite from iron oxide powder and aluminum powder. However, I have a couple of questions about copper and iron oxides. The kind of iron oxide that is made by ...
ElectronicsNoob's user avatar