Oxidation Definition and 204 Threads

When metals such as sodium react with an acid, a salt and hydrogen gas is produced. and we know for sure the oxidation state of sodium in the compound will be +1. But for other metals such as iron, when they rest with acids which oxidation state do I use? I'm unsure if I'm supposed to use the...

Methane from natural gas could be a great source of energy (eg. in thermoelectric plants), but the need to curb CO2 emissions stands in the way. I wonder whether one could get useful energy from some partial combustion reaction of CH4, that yields H2O plus some carbon-containing solid that...

I would like to oxidize suspended elemental sulfur to sulfate in a solution. Any suggestions?

Homework Statement I have a test coming up and some of the practice questions were things like "Name 6 elements with a maximum oxidation state of +7" or some other number like +8, +6, etc. How do I go about doing this? The Attempt at a Solution There is the obvious trick of counting...

Homework Statement Im having some problems with some oxidation and reduction mechanisms. I am not sure if I am doing them correctly. Homework Equations 1. O=C=O + CH3-MG++I- 2. Acetone + NH4+, Na+ H3BCN The Attempt at a Solution 1. I break one of the bonds from the oxygen...

Hi everyone, I'm working on random materials which are coincidencely oxides and showing semiconductor behaviour... Some of these are metals and i suddenly realize MOS (which are practically everywhere). I know them, i know how they work and behave still i can't get to understand the effect of...

Few things I'm curious about regarding zirconium use in reactors. I know at high temperatures it can release hydrogen from water by forming zirconium oxide. But: http://en.wikipedia.org/wiki/Zircaloy" this suggests that once a surface layer is formed no more oxidation can take place...

Could someone explain the mechanism of radiolytic oxidation to me? There seems to be very little information available on the net. It is mentioned on http://www-pub.iaea.org/MTCD/publications/PDF/te_1521_web.pdf" :

Hi there! I have a quick question that could use some clarification. According to my textbook, an oxygen atom has an oxidation state of -1 when in the polyatomic ion peroxide, although it's -2 in most other cases. However, I've come across this problem where it asks for the oxidation state of Ti...

Just have a few questions about the cause of heart disease and oxidation of fats. I am looking for some studies that relate to the questions if possible. 1. Does saturated fat cause atherosclerosis or is it the oxidized cholesterol that usually accompanies it (as in most cooked animal...

Hi Why does Ni only form NiO with oxidation state of +2 whereas the other transition metals form a wide range of oxides with variable oxidation states Thanks

1. I have a question regarding an iron nail wrapped with zinc. The question asks me "Is it correct to say that corrosion did not take place in the nail wrapped with zinc? Explain." I am not sure whether this is correct but I know that that zinc is more reactive than iron and will thus be more...

Hi I am interested in the change in the stability of the oxidation states of manganese with pH Mn is a stronger oxidising agent in acid than in base which would lead you to believe that the higher oxidation states of Mn are more stable in alkaline conditions. Does anyone have a reason...

Hello- I recently etched an Altoids tin. I would like to leave the etched tin in an outdoor location as a memorial to something. The etching includes text, and I am worried about oxidation of the steel ruining the tin quickly. I would ideally like for this to last several years (as long as...

What is the purpose of oxidation during the process of making processor? Is it repeatedly perform, like photography?

If I have SO42-, I can figure out that the oxidation state of each O ion is 2- and the sulfur ion must then be 6+. What does this number mean? What does it tell you about the electrons in that molecule?

Pretty exciting development to convert water to hydrogen and oxygen appears in http://www.sciencemag.org/cgi/content/abstract/science.1185372" ). The catalyst is based on Co4O4 stabilized with bulky polytungstate ligands. The best part is that the complex spontaneously organizes into the...

What is the point of adding the sodium dichromate dehydrate in water solution dropwise to benzhydrol in glacial acetic acid? Why can't we just add it all in at once? Also, what is the purpse of the glacial acetic acid?

I can't understand the term oxidation number.According to my textbook, it is the charge assigned to an atom. But for what purpose we are doing this?Is it for identifying the oxident and reductant in a reaction?If yes, on what basis the rules (for assigning oxidation states) are implemented...

This isn't a homework question, but seemed sufficiently low-level that it belonged in this part of the forum. When one speaks of "common" oxidation states, what is meant by "common?" Is this simply to say the states most commonly occurring in nature? This would be opposed to most commonly...

I have a question regarding the possible oxidation states of metals. I understand how to find the oxidation state of a metal in a compound, that's pretty straightforward. What I'm interested in is finding possible oxidation states given only the name of the metal. For example, Cu has possible...

I posted this on thedishforum: On the German soapmaking forum, there are several posts noting that there seems to be a correlation between ash and oxidation of oils. Can you speak to the presence of ash and soap going rancid? And got this reply: Yes, I could see this being an accurate...

On the German soapmaking forum, there are several posts noting that the presence of ash and the oxidation of oils(rancidity) often go together. When the ash appears in small amounts, I have not noticed any oxidation. When the ash develops over much of the surface of the soap bars, the soap...

Homework Statement http://carlodm.com/pictures/problem.png The Attempt at a Solution I'm stuck. Usually I balance the equation by multiplying the Fe(OH)2 and Fe2O3 by 3. However, I can no longer do this because Fe2O3 has two iron's per one molecule. Do I multiply one by 6 and...

Determine the oxidation numbers of the underlined elements in the following formulas:? If you could explain each one, it would be greatly appreciated. Thanks! a) KClO3 b) NH4+ c) Cr2O72- d) MnO42-

Homework Statement Calculate the oxidation no. of Nitrogen in: NH4NO3 Homework Equations O=-2 H=+1 The Attempt at a Solution N H4 N O3 +4 -6 = -2 to make it equal zero then 2N=+2 hence N=+1 Or NH4=+1 then N=-3 NO3=-1 then N=+5

Ok so the question goes as such: Write the half equation for the oxidation reaction and then the full net ionic equation for KMnO4 solution mixed with dilute HCL. My main problem is what is getting oxidised?

Hello! I just registered on these forums and this is my first post here, so hopefully I did everything right. I recently got into metalworking in my spare time, and I am trying to create a metal alloy that will remain liquid at room temperature (a fusible, eutectic alloy). From what I've...

What happens when alcoholic beverages are left exposed to air? i read that they are oxidised to ethanoic acid. Strictly only ethanoic acid? Why not say, propanoic acid? Or a mixture of acids possible to be present? Is it because only ethanol is present in alcoholic drinks? If so, only ethanol then?

How come atoms have only a few oxidation numbers they can assume? For example, Cl can have the oxidation numbers -1, 1, 3, 5, 7. What prevents it from having an oxidation number of say, 2 or 4?

My friend needs to clean his head light lenses and they are plastic , does anyone know a chemical that will dissolve plastic or clean the lens to cut the oxidation , i could buff the lens but i would rather use a chemical, I was thinking along the lines of lacquer thinner.

balance the following oxidation reduction reactions. which is the oxidizing agent? reducing agent? ()my answer as balance a) P4 + Cl2 =(4)PCl5 reducing agent P, o agent Cl b) Sn2+ + Cu2+ = Sn4+ + Cu+ reducing agent...

Determine the oxidation number for each atoms in the following compounds or ions: a) H3 0+ ox # -2 b)P4 O10 ox #-3 c)S8 ox #5 d)H2 CO ox #4 e)NH4 CLO4 ox #2 I need help to know if i am doing it right.

determine the oxidation number for Mn in each of the following: a) KMnO4 is the ox # -3 b) LiMnO2 is the ox # +1 c) MnO2 is the ox # +2 d)K2 MnCl is the ox # +1 e)Mn2 O7 is the ox # -10 I need help ASAP PLEASE!

The question is True/False. The answer is false, and I don't know why. All those oxidation #s seemed to make sense to me, and I couldn't think of any others. Any thoughts as to why that's not true?

This is the question from the lab of "comparision of three isomers of butanol" GR 12 pg 84

My original question: Why do oxidation reactions from primary alcohols to aldehydyes/carboxylic acids, or secondary alcohols to ketones require an acid (positive hydrogen ion)? I can see that the reason we have an oxidizing agent is to take away two hydrogen ions from the alcohol, but why do...

Hi guys, my teacher once told me that if there's a benzene with a side chain which has a carbon group (e.g. aniline or benzaldehyde or 3-phenylpropane) it will be oxidise into benzoic acid, no matter what it is. So my question now is, does oxidising phenylethanal gives me benzoic acid? or say...

Just a brief question on oxidation numbers. My textbook says "the oxidation number of the more electronegative atom in a moledule or a complex ion is the same as the charge it would have if it were an ion." However, when considering compounds like hydrazine N2H4, Nitrogen is clearly the more...

Homework Statement 3Ag2 S + 2Al --> 6Ag + Al2 S3 consider the equation for silver tarnishing. a) state the oxidation number for each element in the reaction. b)identify the the oxidized reactant and the reduced reactant. The Attempt at a Solution Ag2=2 S= -2 Al=0 --->...

Hello, I'm writing a paper on the effect oxidation has on creep in metals. I'm a bit lost as I've been able to find is papers on this topic for specific metals. Could anyone suggest a good paper or good book that could help light the way that talks on diffusion creep or better still the...

Homework Statement This is from a lab question, but i think i did it right, i would just like some confirmation. I had to make an electochmical cell for a lab, (actually mutiple ones) but it asks me to find the anode, cathode, and which chemical underwent oxidation and reduction. If you have...

At what point in either beta-oxidation or citric acid cycle is ATP used? I see where ATP is produced in citric acid cycle (originally as GTP) as when succinyl CoA is converted to Succinate, but I can't find any part where ATP is required. Apparently according to my lecture notes, it is...

Homework Statement I wasn't sure about some of these problems, am I doing them correctly? 1) What volume of each of the following bases will react completely with 25.00 mL of 0.200 M of HCl? a) 0.100 M NaOH .02500 L x .200 mol HCl/1 L = .00500 mol HCl .100 M NaOH = .00500 mol...

Homework Statement Is this oxidation or reduction: (NO3)- ---> NO (this is a half reaction I took from the full equation) Homework Equations Not necessary The Attempt at a Solution At first, I got the oxidation states of each of the atoms For (NO3)- N has an oxidation...

Hello: I am having some trouble relating to the following question to the concept of oxidation numbers as required by my practice problem, and would appreciate any help. Thank you! --- 1. Explain why it is dangerous to grind a mixture of Al with KClO4 in a mortar and pestle. ---...

Homework Statement Why does the stability of highest oxiation state decreases from group 13 to group 17? Ans: My book says, that with the increase in atomic number, difference in energies between ns and np orbitals increases. Is it right? If so then can u please explain what relation...

The most common oxidation states of chromium are +2, +3, and +6, with +3 being the most stable. +1, +4 and +5 are rare. Questions; 1. As given above, +2, +3, and +6 are stable, what are the possible reason of there oxidation state stability ? 2. +3 was the most stable oxidation state of...

Homework Statement C6H12O6\rightarrow 3CO2 + 3CH4 \DeltaH = -132 kJmol-1 C6H12O6\rightarrow 2CO2 + 2C2H5OH \DeltaH = -68 kJmol-1 1. Calculate the oxidation number of carbon in each of the products of the first reaction. 2. Comment on the relative advantages and disadvantages...

I'm having trouble finding a suitable material to keep critters from nesting under our solar panels. Galvanized steel mesh oxidizes quickly because being attached to the solar modules, and plastic mesh just isn't strong enough and looks unsightly. I need a steel or metal mesh that will not...