Questions tagged [oxides]
The oxides tag has no usage guidance.
54
questions
-2
votes
2
answers
183
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?
- 115
1
vote
0
answers
62
views
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 ...
- 677
5
votes
1
answer
302
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 ...
- 53
1
vote
1
answer
93
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 ...
- 91
-6
votes
2
answers
125
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.
- 1,490
-2
votes
1
answer
60
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 + ...
- 5
-1
votes
1
answer
51
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?
1
vote
1
answer
42
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. ...
- 23
-5
votes
1
answer
80
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 ...
- 109
0
votes
0
answers
28
views
Make Yellow rust on cast iron
I am an artist looking for a chemist to collaborate with. I an trying to create Yellow Rust on an old french cast iron fireplace insert.
Aside from vinegar, salt and hydrogen peroxide (that result in ...
2
votes
1
answer
75
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 ...
- 21
8
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 ...
- 1,570
1
vote
0
answers
81
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 ...
- 19
1
vote
0
answers
26
views
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 ...
- 111
5
votes
1
answer
187
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 ...
- 677
6
votes
1
answer
369
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.
...
- 677
5
votes
0
answers
153
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 ...
- 37.4k
6
votes
1
answer
450
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 ...
- 69
3
votes
1
answer
379
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 ...
user120451
-1
votes
1
answer
495
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 ...
- 131
-1
votes
1
answer
60
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?
0
votes
0
answers
55
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 ...
- 25
-3
votes
2
answers
225
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 ...
- 97
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 ...
1
vote
2
answers
438
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.
2
votes
1
answer
84
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 ...
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 ...
- 11
5
votes
1
answer
151
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 ...
- 5,742
11
votes
1
answer
384
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 ($\ce{Ra3N2}$)....
- 451
3
votes
0
answers
122
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 ...
- 47
2
votes
1
answer
412
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 ...
- 13.9k
-3
votes
1
answer
244
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 ...
- 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 ...
- 303
0
votes
0
answers
91
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 ...
- 93
0
votes
1
answer
129
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 ...
- 1,077
1
vote
1
answer
372
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 ...
- 1,202
1
vote
1
answer
55
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 ...
- 159
0
votes
1
answer
422
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 ...
- 181
0
votes
0
answers
29
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?
- 709
1
vote
3
answers
632
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)
...
- 159
8
votes
2
answers
847
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 ...
- 6,905
3
votes
2
answers
321
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 ...
- 5,742
0
votes
1
answer
1k
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 (...
- 387
4
votes
2
answers
472
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?
- 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 ...
- 181
1
vote
1
answer
1k
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 ...
- 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 ...
- 469
0
votes
1
answer
223
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 ...
-1
votes
1
answer
918
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 ...
3
votes
3
answers
705
views
Effect of magnetization on oxidation (rusting) of iron
Can magenetizing a piece of iron bar slow-down (or speed-up) the oxidation (rusting) process? In other words have any influence on it ?
From what I've looked up( wikipedia, quora), it appears that the ...
- 139