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Start by writing two half reactions. Next, balance the main element. Then balance the oxygens by adding water to the appropriate side. Next balance the hydrogens by adding H+ to the appropriate side. Next balance the charge by adding electrons to the appropriate side. Then combine the two half reactions in such a way that the electrons cancel. If you are in a basic solution, you then add hydroxide ions to both sides of the equation, converting the H+ ions into H2O. For example, if you are given the skeleton equation
Fe(2+) + Cr2O7(2-) --> Fe(3+) + Cr(3+) , start by writing two half reactions:
Fe (2+)--> Fe(3+)
Cr2O7(2-) --> Cr(3+)
Then balance the main element in each half reaction:
Fe(2+)-->Fe(3+)
Cr2O7(2-)-->2Cr(3+)
Next balance the oxygens in each half reaction:
Fe(2+)--> Fe(3+)
Cr2O7(2-) --> 2Cr(3+) + 7H2O
Now balance the hydrogens in each half reaction:
Fe(2+)--> Fe(3+)
Cr2O7(2-) + 14H+ --> 2Cr(3+) + 7H2O
Now balance the charge in each half reaction:
Fe(2+) --> Fe(3+) + e(-)
Cr2O7(2-) + 14H+ +6e(-) --> 2Cr(3+) + 7H2O
Now you want to combine the equations and cancel the electrons, so you multiply the first equation by six and add the equations together:
6Fe(2+) + Cr2O7(2-) + 14H+ +6e(-) --> 6Fe(3+) + 6e(-) + 2Cr(3+) + 7H2O, which is the same as 6Fe(2+) + Cr2O7(2-) + 14H+ --> 6Fe(3+) + 2Cr(3+) + 7H2O.
If you are in acidic solution, you are now done. If you are in basic solution, you need to deal with the H+ ions by adding hydroxide to both sides of the equation.
6Fe(2+) + Cr2O7(2-) + 14H+ + 14OH- --> 6Fe(3+) + 2Cr(3+) + 7H2O + 14OH-, which is 6Fe(2+) + Cr2O7(2-) + 14H2O --> 6Fe(3+) + 2Cr(3+) + 7H2O + 14OH-, or
6Fe(2+) + Cr2O7(2-) + 7H2O --> 6Fe(3+) + 2Cr(3+) + 14OH-
Voila, you're done!
Wiki User
∙ 16y ago
Wiki User
∙ 11y agojust practice the method 8-9 times u will get perfection....and it will not consume any time afterwards..!!
Wiki User
∙ 9y agoThe oxidation reaction between magnesium metal and oxygen, for example, involves the oxidation of magnesium. 2 Mg(s) + O2(g) -----> 2 MgO(s)
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In a redox reaction the numbers of some of the elements changes from the reactants to the products?
In a redox reaction the OXIDATION numbers of some of the elements change from the reactants to the products. The numbers of atoms each element never changes in any chemical reaction.
Can silver nitrate be in a redox reaction?
With what? Not enough detail, but silver is not very electropositive. Pretty much any compound or chemical entity can be involved in a redox reaction of some kind. The obvious redox reaction involving silver nitrate would involve silver ions being reduced to silver metal, plus some corresponding oxidation reaction.
How do you get white out off of rugs?
Spot Clean using liquid cleaning agents that you should fist test out in a small not-so-noticeable area of the rug to see whether there are any negative reactions. Visit http://rugcaremaintenance.wordpress.com/ for more rug tips.
What chemical substances are formed when oxidation occurs?
Oxidation is one part of a redox reaction, where redox stands for reduction-oxidation. Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. It need not involve any oxygen and the question is too underspecified to have a sensible answer.
Is helium flamible?
No, helium does not readily undergo any chemical reactions.
A way electrons can be transfered?
Electrons are transferred in any protonation or deprotonation. Electrons are also transferred in redox (oxidation-reduction) reactions.
Does Roald Dahl have any tips of writing?
roald dahls dead?
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I dont know of any free online writing classes as such, but there's plenty of websites that will share help and tips about how to write online.
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I think that there isn't really ANY tips for writing a good song. I feel a REALLY good song comes from the soul! You have to write about what you feel and what you know! You can just sit down get a pen and some paper and just start writing... then run by yourself and make improvements to it! That is how you write an AWESOME song!!
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don't do any plagarism and you will be fine.
Why redox titraation of any ferrous alloy solution with KMnO4 is possible?
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The website Wiki How has a comprehensive guide on how to write a good book for any subject. The website run by Full Sail has a reliable guide on how to write a book that is worth looking at because it is an educational resource.
Does helium have any chemical reactions?
no. it is not known to undergo any checmical reactions
What reaction is reduction?
In chemistry, reduction is considered the gaining of electrons. Oxidation is the lose of electrons. They go together in reactions called redox (reduction/oxidation). You cannot have a reduction without also having an oxidation.
How is chemical energy produced?
The chemical reaction that creates energy from the digested food, after the food has been absorbed into the body, is called the Kreb's Cycle. It is a series of chemical reactions that converts carbohydrates, proteins, fats, and alcohol into the very basic energy molecule called ATP.
Does burning of magnesium ribbon considered as redox?
Well, let's think about it for a moment. The magnesium is being oxidized by the oxygen in the air. The oxygen is being reduced by the magnesium. Sounds like redox to me. More generally, a redox reaction is any reaction in which the oxidation state of the materials changes. In this case magnesium is going from 0 to +2 and oxygen is going from 0 to -2, so yes, it's a redox reaction.
Do oxidizing and reducing agents have to be reactants?
No, there are other types of chemical reactions besides oxidation-reduction (or redox) reactions. For example, there are polymerization reactions. Dissociation can be the reversal of an oxidation reduction reaction, most often caused by heat, although there are other ways to make molecules dissociate. Electricity can be used to force chemicals to react in certain ways that have nothing to do with oxidation reduction. Some reactions are driven by entropy rather than by oxidation reduction. Systems tend toward a more random state.
