Questions tagged [oxidation-state]

Oxidation state is a concept, which assigns hypothetical charges to atoms in compounds. This tag should be applied to questions which relate to that concept or to oxidation states in atoms of compounds.

Filter by
Sorted by
Tagged with
-1
votes
0answers
17 views

Can halogens posses more negative oxidation states? [duplicate]

I want to know if there is a case where a halogen exhibits an oxidation state that is more negative than −1, viz. −3, −5 and −7. I thought $\ce{ClI3}$ would be an example, but I can't find such a ...
0
votes
0answers
23 views

XPS Analysis: How do they identify oxidation states based on electronic levels? [closed]

I am doing an XPS analysis of some nanoparticles and I have read that in order to understand the analysis it is necessary to understand all the chemistry around an atom, which is what I am doing. In ...
-3
votes
1answer
80 views

Is it easier to oxidise iron(II) to iron(III) in acidic or alkaline solution? [closed]

Is it easier to oxidise $\ce{Fe^2+}$ to $\ce{Fe^3+}$ in acidic or alkaline solution? $$ \begin{align} \ce{Fe &-> Fe^2+(aq) -> Fe^3+(aq)}\\ \ce{Fe &-> Fe(OH)2 -> Fe(OH)3} \end{align}...
1
vote
2answers
88 views

Is there an error in a Wikipedia article explaining the influence of oxidation states?

Referring to the series of oxoacids of chlorine: $\ce{HClO, HClO2, HClO3},$ and $\ce{HClO4}$, tabulated in the Wikipedia article on electronegativity, the article states, in the section near the end ...
-2
votes
0answers
43 views

Why is the oxidation state of Cu in YBa2Cu3O7 +7/3? [duplicate]

Cu shows only two oxidation states +1 and +2 while 7/3 is greater than 2. Then how is +7/3 possible in YBa2Cu3O7?
-5
votes
1answer
40 views

Determining Oxidation Number [closed]

In NH3, what's the oxidation number of H? Should it be +3 or +1? I'm a little confused what to use.
1
vote
2answers
57 views

Does plant material oxidize from 02 gas (air or solved in water) and/or oxygen in H20? [closed]

https://en.m.wikipedia.org/wiki/Curing_of_tobacco Hi This is my first time growing tobacco for fun, pleasent green at home, to make snuff for personal use and maybe save som money. Ive been reading a ...
0
votes
1answer
55 views

How to draw the structure and find the oxidation number of Phosphorous in H2P2O7 [closed]

Find the Oxidation number of Phosphorus in $\ce{H2P2O7^2-}$. So I thought of drawing the lewis structure to find the oxidation numbers. Because I wasn't sure if Oxygen was bonded to a Hydrogen or not. ...
0
votes
1answer
59 views

I am having problem with this question including topics of redox reactions and charges [duplicate]

What is the oxidation number of $\ce{Fe}$ in $\ce{K4[Fe(CN)6]}$? This seems to be a pretty easy problem. Just input the oxidation numbers of everything and equate for 'x'. But the problem is that I ...
3
votes
2answers
97 views

How does overvoltage affect the products of electrolysis?

When you electrolyse an aqueous solution of $\ce{NaCl},$ the product formed at cathode is $\ce{H2}$ gas (preferential discharging), but the product formed at anode is $\ce{Cl2}$ gas. According to ...
4
votes
1answer
75 views

In a battery, what happens to LiCoO2 when the lithium leaves? It becomes CoO2?

What chemical compound exists at the cathode of a lithium-ion battery when the lithium is not there? The cathode is usually described as $\ce{LiCoO2}$, so does it become $\ce{CoO2}$? $\ce{CoO2}$ ...
0
votes
0answers
25 views

Can ZrO2 be made fluoride resistant?

$\ce{ZrO2}$ has great properties, biocompatibility, chemical resistance, decent scratch resistance, great thermal resistance and refraction, but it could be better. It, like glass, will slowly react ...
0
votes
1answer
79 views

What is the state of aggregation of iodine formed during electrolysis of molten nickel(II) iodide? [closed]

Assume the electrolysis of molten $\ce{NiI2(l)}$ (inert electrodes) in a cell. The cell with a heating element is in the room; the room is at $\pu{25 °C}$ and $\pu{101.3 kPa}.$ The half-reaction for ...
1
vote
0answers
34 views

Is it possible to oxidize beryllium metal around NTP or not?

Perhaps this seems like a really simplistic question to many of you, but I’ve read too many conflicting answers at this point. Simply put, most articles I’ve read have insisted that it isn’t possible ...
0
votes
1answer
111 views

How to find the oxidation numbers of individual ions of a transition metal with an average fractional oxidation state

In the classical example compound of $\ce{Fe3O4}$, we know that $\frac 23$ of Fe ions display +3 oxidation state and $\frac 13$ of Fe ions display +2 oxidation state fulfilling charge neutrality ...
3
votes
1answer
108 views

Bonding and coordination of oxygen in a Ga2O3 crystal structure [duplicate]

I'm trying to find the crystal structure of gallium oxide ($\ce{Ga2O3}$). However, I find the images of the crystal structure in the peer-reviewed journals problematic. First, I hop to the wikipedia ...
2
votes
1answer
34 views

Nickel salts from hypochlorites

(JUST A HEADS UP I’m 15 years old and new to chemistry) So I was recently looking around the house looking for products that I can extract chemicals from and I found a bottle of cleaning Vinegar ( 5% ...
0
votes
0answers
112 views

why is HClO a better oxidizing agent than HClO2, HClO3, HClO4? [duplicate]

Why do the oxoacids of chlorine have the following order of oxidizing power: HClO > HClO2 > HClO3 > HClO4 ? When I search it online, many posts say "because the oxidation state of Cl in HClO is the ...
-1
votes
2answers
68 views

What will happen if I trap an ozone producing device inside a small airtight area? [closed]

I'm currently building a UVC light, and right now I'm working on figuring out how to place it in an aluminum reflector housing to cast the beam of light effectively. It's creating a lot of ozone, and ...
-1
votes
1answer
30 views

Ambiguity in oxidation state of phosphorus in H3PO3 [duplicate]

Phosphorus(2.19) is less electronegative than hydrogen(2.20), so during calculation of oxidation state of phosphorus the oxidation state of hydrogen should be taken as-1 but in books it's taken as +1 ...
0
votes
1answer
35 views

How does one calculate oxidation states? [duplicate]

For example, how could I calculate the oxidation state of lead in $\ce{PbS}$? Or for that matter how would I calculate it for sulfur? Or I have two unknowns, for example sulfur in $\ce{PbSO4}$? Do I ...
1
vote
2answers
51 views

Why does the oxidizing strength of the chlorates decrease with increasing oxidation number?

Here is a table of the standard reduction potentials of the chlorates from wikipedia: Intuitively, one would expect that the more positive the oxidation state, the more oxidizing that compound would ...
-1
votes
1answer
53 views

For group 13 elements M³⁺, why is the formation of MCl₄⁻ more favorable than for group 12 elements M²⁺?

I'm not a chemist and I'm trying to understand a chemistry point from a talk I went to recently. Any help would be much appreciated. The speaker was talking about $+3$ (Group 13) elements in the ...
-2
votes
1answer
24 views

How electron configuration is related to the oxidation state of an element such as sulphur and can this be extended for elements in other blocks? [closed]

The question arises from trying to get where does the values of $-2$, $0$, $+2$, $+4$ and $+6$ from the electron configuration. The electron configuration for sulphur $(Z=16)$ is $[Ne]3s^23p^4$. It ...
0
votes
0answers
72 views

CuS+HCl is it a reduction or oxidation reaction

How do we identify whether a reaction is oxidation or reduction and please let me know whether the equation given above is oxidation or reduction.
0
votes
0answers
106 views

Oxidation states the elements in nitrosyl chloride

I have read that $\ce{NOCl}$ dissociates to $\ce{NO+}$ and $\ce{Cl-},$ and the various reasons stated as such seem fine. But what I don't get is this: if we follow the actual rules of assigning ...
-1
votes
3answers
42 views

Can you create different colors of rust on iron? [closed]

I am looking to see if anyone out there can tell me if there is a way to create different colors of rust on iron. I'm specifically looking to see if I can create blue rust without heating the metal ...
5
votes
1answer
732 views

How does Potassium Hexfluoronickelate(IV) exist in a stable state?

Nickel generally does not exist in a $+4$ Oxidation state. Wikipedia has the following to say regarding Nickel(IV): Ni(IV) is present in the mixed oxide $\ce{BaNiO3}$. ....... Ni(IV) remains a rare ...
0
votes
0answers
207 views

Oxidation number of Oxygen in peroxides: -2 or -1?

My textbook says that the oxidation number of Oxygen in peroxides is -2, but when I searched up the internet, I found it to be -1. It could probably be a misprint in my book, but I am still not sure. ...
-2
votes
1answer
71 views

why is both types of oxides (Eo2 and Eo) of group 16 acidic? [closed]

the oxidation state of E in Eo2 and Eo3 is +4 and +6 respectively ...then how can both of them be acidic ?
1
vote
0answers
20 views

Black substances covering Aluminum Electrode

I have use two aluminum pieces as electrodes to electrolys salt (NaCl) water. After the experiment, I found that wherever electricity flows, the electrode will be covered in some blackish substances. ...
0
votes
0answers
413 views

Oxidation number of Si in SiH4

Wikipedia has the following reaction: $\ce{Mg2Si + 4 HCl → 2 MgCl2 + SiH4}$ This seems to be a double displacement (metathesis) reaction, where $\ce{Si}$ has oxidation state $-4$. However, I ...
3
votes
3answers
285 views

Determining the oxidation state of a bridging platinum complex

I want to ask a question about determining the oxidation state of a Platinum complex. I was presented today with the following complex and asked to comment on the oxidation state and hence the d-...
-4
votes
2answers
184 views

Oxidation state of Manganese [closed]

We know that Mn shows variable oxidation states ranging from +2 to +7 but why is +1 oxidation state of Manganese(Mn) not stable? The +1 oxidation state of Mn would have a configuration of 4s1 3d5. ...
1
vote
1answer
44 views

Naming a coordination compound

I was asked to determine the coordination compound which has the name: $$\text{triamminetrinitritocobalt(I)}$$ I thought it must be: $$\ce{[Co(NH3)3(ONO)3]^2-}$$ The $-2$ charge can be deduced by ...
1
vote
0answers
23 views

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 ...
1
vote
2answers
1k views

How is Zn not a transition metal? [duplicate]

A transition metal can be defined as an element that possesses an incomplete sub-level in one or more of its oxidization states. In the textbook I'm reading, it claims that zinc is not a transition ...
2
votes
0answers
405 views

Oxidation state of chlorine in ClO

Today, I had a friendly debate with my friend on what should be the oxidation state of $\ce {Cl}$ in the chlorine monoxide radical. I took the view that it should be $\ce {+2}$ while he took the view ...
0
votes
0answers
42 views

Clearing my doubt over Electronegativity and oxidation state

I was doing a question in which we were required to find the oxidation state of $\ce{H3PO3}$. I knew the structure that is: Now, Phosphorus being less electronegative than oxygen get $+2,+1,+1$ ...
-1
votes
1answer
77 views

Question About Reversible Reactions and Batteries

So my book says that the batteries we have considered so far( Daniell cells) are low life span, because they reach equilibrium too fast. In the next paragraph, it says they are also made by ...
3
votes
1answer
216 views

How can batteries reach equilibrium if the reactions are irreversible?

My book says that the batteries we have considered so far (Daniell cells) have a low life span because they reach equilibrium too quickly. In the next paragraph, it states they are also made by ...
8
votes
1answer
351 views

The oxidation state of iodine in iodoxybenzoic acid

I am slightly puzzled by this seemingly trivial question. The idea behind assigning oxidation states is simply to treat every single bond made by the atoms as ionic bonds. That is to say, both the ...
-4
votes
2answers
87 views

Why is this reaction not a redox? [closed]

My question may seem too simple. But I couldn't find why this is not a redox. $$\ce{Hg2(NO3)2 + 2KBr -> Hg2Br2 + 2KNO3}$$ In $\ce{Hg2(NO3)2}$ compound atoms have following states: O: -2 N: -3 Hg:...
2
votes
1answer
69 views

Are there chemicals that absorb and release upon heating oxygen more efficiently than potassium oxide? [closed]

$\ce{K2O}$ absorbs oxygen forming $\ce{K2O2},$ which decomposes to $\ce{K2O}$ and $\ce{O2}$ at 500 °C. This means that $\ce{K2O}$ can absorb up to 17% its mass of oxygen. Are there other substances ...
2
votes
1answer
98 views

Do different oxidation states of the same element have the same emission spectrum?

I looked at the flames of copper (I) chloride and of copper (II) chloride through a spectroscope and they looked the same. The flame colour is the same too. But since they have different oxidation ...
0
votes
1answer
60 views

Balancing the chemical equation using Oxidation Number Method [closed]

Permanganate ion reacts with bromide ion in basic medium to give manganese dioxide and bromate ion. Write the balanced ionic equation for the reaction. Please balance the equation using the oxidation ...
-1
votes
1answer
71 views

Cup with vinegar/salt/copper solution previously in it ran through dishwasher

Someone enjoys making jewelry, and saw an online tutorial saying that you can mix equal parts of vinegar and salt, and leave copper in it for a while to oxidize it, and turn it green. After doing ...
-2
votes
1answer
54 views

Why do we need to use oxidation number in order to balance a complex chemical reaction easily in an acidic or alkaline medium? [closed]

I have been trying to balance this chemical reaction in an "acidic" medium without using oxidation number or ion electron method: [$\ce{Fe^2+ + Cr2O7^2- -> Cr^3+ + Fe^3+}$]. Though I can balance ...
16
votes
1answer
2k views

What is the oxidation state of Mn in HMn(CO)5?

What is the oxidation state of $\ce{Mn}$ in $\ce{HMn(CO)5}$? If $\ce{H}$ has an oxidation state of $+1$, then $\ce{Mn}$ should have oxidation state of $-1$, which I'm not sure is possible. On the ...
0
votes
1answer
350 views

Which of the following reactions doesn't represent an oxidation-reduction [closed]

Which of the following reactions doesn't represent an oxidation-reduction? $$ \begin{align*} \ce{2 P + 5 HClO + 3 H2O &-> 2 H3PO4 + 5 HCl} \\ \ce{Zn + 2 HCl &-> ZnCl2 + H2} \\ ...

1
2 3 4 5
7