Redox Definition and 204 Threads

Homework Statement I have to calculate the redox potential of this equation: Cr2(SO4)3 + 4K2SO4 + 3J2 +7H2O <=> K2Cr2O7 + 6KJ +7H2SO4 I used the nernst equation to calculate the potentials of 2Cr(3+)+7H2O -> Cr2O7(2-) +14H(+) +6e(-) and I2 +2e(-) ->2J(-) which were -1.42V and 0.51V, all...

[SOLVED] Redox titration help Hi In class we are doing a redox titration with a diluted bleach solution. We made the aliquot with 5 ml of 10% KI solution and 5ml H2SO4 with 25 ml of the diluted bleach solution. And the burrette solution was sodium thiosulfate @ 0.1 mol L-1. my results were as...

determine the % of iron II and iron III in a mixture containing both, where i am given 200cm3 of a solution containing 1.3g of iron ions(Fe 2+ Fe 3+) using potassium magnanete. I wrote down the equation already, and method, but i don't know how to work out the % from it :/ Can you please help...

what is the redox reaction for barium. and how is that figured out.

Help me please to finish this reaction of the ferrocyanide reduction: K3Fe(CN)6 + Na2S2O3 + H2O=...? the electron transfer reaction inthis case is 2Fe(CN)3-6 + 2S2O3 = 2Fe(CN)4-6 + S4O2-6. Wondering what are the final products of the upper reaction.

I'm trying to find out what type of reaction this is. a drop of water is added to a small pile of chemicals in a dish, after a few seconds, a blue flame and smoke is produced. NH4NO3 reacts to form (with chlorine as catalyst) N2O and water the experiment is called oxidation of zinc, so...

I am performing a REDOX titration of a diluted bleach sample in my analytical chemistry class. I am using sodium thiosulfate as the titrant to determine the amount of sodium hypochlorite ion in solution. I am using a starch indicator, which is supposed to turn from blue to colorless at the...

Homework Statement For those who have mastered the balancing of any type o redox equation, an extra challenge is provided below. Balance each of the following equations. Note: all of the reactions take place in aqueous solution. Homework Equations HIO3 + FeI2 + HCl ====> FeCl3 + ICl +...

1. Oxalic acid, H2C2O4, reacts with dichromate ion, in acidic solution to produce carbon dioxide and chromium(III) ion. If exactly 50.0 mL of an oxalic acid solution is required to react completely with 25.0 mL of a 0.0100 M dichromate solution, what is the molarity of the oxalic acid...

Homework Statement Balance this redox equation. Homework Equations Ag + H^{+} + NO_{3} ^{-} \rightarrow Ag^{+} + H_{2}O + NO The Attempt at a Solution Using a conventional balancing mechanism I got these coefficients: 1 + 8 + 2 -> 1 + 4 + 2 but the correct...

Balancing a Redox Reaction.. urgent I have an assingment that is due tomorrow for my college chemistry class and i am stuck on the last problem. I need to balance the following redox reaction, but everytime i try it doesn't balance... H2O +I2 + OCl- ? IO3- + Cl- + H3O when i split it up...

im currently studying redox in chemistry and I am really enjoying it so far. I am just a little bit confused about one section of it, that is that i cannot understand how to work out the product in the 1/2 equations .. e.g Fe2+ forms Fe3+.. but why does it form this.. i know iron is a...

Homework Statement Write the half equation for the cathodic reaction of oxygen The Attempt at a Solution Now I know that the cathodic reaction will be reduction and so the oxygen will be gaining electrons. I thought I had the answer from the lecture notes, but then I thought of another...

Homework Statement Identify the oxidizing agent and the reducing agent and write a balanced equation for each half reaction. MnO4(1-) + VO(2+) ----> Mn(2+) + V(OH)4 (1+) Homework Equations None. The Attempt at a Solution I know how to do these when there is just one atom...

Nowhere in my notes does it say what Eθ is and i can't find a definition of it on the internet :confused: I'll give you the context: For group 2 of the periodic table, state and explain the trends in the following for their elements: (i) redox property, related to Eθ value

Homework Statement Cl2 -> Cl- + ClO3- (in basic solution) Homework Equations The Attempt at a Solution Well, I've tried messing around with the half reactions but since Cl2 is involved in both, they don't seem to do much good. e + Cl2 -> Cl- Cl2 -> ClO3- + 5e Normally, I would multiply the...

Homework Statement A sample of iron ore consisting of a mixture of FeO and Fe2O3 was dissolved in dilute sulfuric acid. The resultant solution was divided into two equal aliquots. The first aliquot was titrated with a potassium permanganate solution containing 6.30g of KMnO4 per litre, and...

Homework Statement Balance the following redox equation (in an acidic solution): Cu + NO3- -> NO2 + Cu2 The Attempt at a Solution I got 4H+ + 2NO3- + Cu -> Cu+2+ + 2NO2 + 2H2O But my book told me the same thing, but without the H2[/sub]O: 4H+ + 2NO3- + Cu ->...

Homework Statement 1) Give the resultant fomula for: Cr2+ gets reduced. 2) Will the following reaction occur? Acidified K2Cr2O7 solution is added to HNO3(nitric acid). Homework Equations N/A The Attempt at a Solution 1) I put: Cr+2 + 2e- ---> Cr(s); I have one question...

I'm working on a chemistry assignment that involves creating redox tables. The explanation in the textbook isn't a very good one and I can't find my answer through google either :mad: Here's the problem: The following equations represent spontaneous reactions. From this evidence, set up a...

Homework Statement Excess acidified potassium permanganate is added dropwise to an ammonium iron(II) sulfate solution. Write an overall redox equation for this process. 2. The attempt at a solution Well I am not really sure what to do. I don't know what products are being formed. What...

What is the point of using the redox convention in describing reactions involving covalently bonded species? To me it is a very unnatural thing to do? A reaction can occur with a rearrangement of atoms but no change in oxidation numbers of the atoms so a redox reaction hasn't occurred but a...

Hello, Today, we saw an experiment where an unknown yellow solution became dark blue while it was being shaken. I have an explanation for it, but would like your opinion as well: We had a redox reaction, with the oxidation of glucose (being the reducing agent) by NaOH (being the...

i have to balance a redox reaction that contains the cyanide ion and other stuff. but before i can do anything, i have to assign oxidation states. would hte CN- have oxidation states of C being +4 and N being -5? so then would CNO- have C be +4, N be -2, and O be -2?

I have many problesm with this question. Can somone help me please? In a titration of patasium permanganate soloution with acidified sodium nitrate solution MnO4- + BO2- H+ -----> Mn+2 + NO3- +H2O 45 ml of 0.05M of KMnO4 reacts complitely with 20.0 mL of NaNO2 solution. Calculate the...

The attachment shows reactions involved in a titration experiment. In the first equation, iodate reacts with iodide in acidic solution to produce iodine. In the second equation, the iodine is titrated with thiosulfate. I know the volume and molar concentration of iodate as well as the volume...

Hey there, recently we just did a lab in Chemistry 101 on "Redox Titrations." I'm now working on the lab writeup but was hoping that someone may be able to help me with this question I am currently stuck on. It asks the following: A sample of Au2(C2O4)3 is contaminated with Li2(C2O4). An...

Hello, I've been working on some redox reactions for the oxidation of manganese. Question: Write the complete formulae for the redox reactions below: i.) Manganese reacts with nitric acid (V) to form Mn2+ ions. ii.) The Mn2+ ions reacts with potassium iodate, KIO4 to form MnO4-...

Hey guys, how can I tell whether a reaction is a redox reaction? For example: 2H[SIZE="1"]2O --> 2H[SIZE="1"]2 + O[SIZE="1"]2

hey guys! i am lost with my current unit...redox reactions. i was wondering if any chem whizzes could lead me in the right direction as how to write the oxidation and reduction equations for the following reaction: IO-3 (aq) + I- (aq)--> I2 (aq) Any help would be greatly appreciated! I...

I am doing Redox Equations in Acid/Base. Anyway, I have one question. I know that you multiply to get a common factor for electrons. However, after you cancel out your electrons, can you multiply by another common factor to remove water or hydrogen? I am leaning towards no, but I am not sure...

Hello. I have a question on balancing redox equations. I’ve tried to follow the steps in my book but I don’t understand how to do it. Can someone please walk me through one. H2S(g) + NO3{-1}(aq) > NO(g) + S(s) (acidic solution) Now the book says I have to add electrons but how? Thanks

I am trying to write a redox reaction for Lead (II) Acetate electrolytically becoming Lead Dioxde and Lead at the anode and cathod of an electrotic cell. I am using the redox reaction of Lead Sulfate in a car battery as a model, but mine doesn't look right. I am not sure if I need to include...

I have been staring at the following problem, and I can't seem to get the correct answer. I tried using half reactions and the oxidation number method, but I don't know which works best. Write balance net ionic equations for reaction in acidic solution. ClO3- (aq) + As2S3 (s) --> Cl- (aq)...

Formation of Hydrazine from Ammonia and Chloramine in basic solution. NH3 + NH2Cl -> N2H4 + Cl- What are the coefficients of NH3, OH-, and N2H4 in the balanced equation? I basically just balanced the hydrogens with an H+, then those with OH-, and got: NH3 + NH2Cl + OH- ->N2H4 + Cl- + H2O...

I had some trouble balancing these using the "ion electron method", ordinarily I'd balance the half reactions (excluding H and O), add H20 to compensate for O, H+ to compensate for H, and electrons to compensate for charge. P4(s) + NO3-(aq) ---> H2PO4-(aq) + NO(g) (in an acidic solution)...

Anyways, can anyone help me with this question.. In 1763, the British Admirality covered wooden ship HMS Alarm with copper sheeting to protect it from marine worms. This was sucessful but, they reported: '... we were surprised to perceive the effect of the copper had upon iron where the two...

hi all, my chemistry assignment had a bunch of questions on redox equations balancing. i got stuck on this one: [tex] \CrI_{3} + KOH + \Cl_{2} \rightarrow \K_{2}CrO_{4} + \KIO_{4} + KCl + \H_{2}O [\tex] so far, i tried to find ON numbers of the various elements. Cr changes from +3 to +6...

Hi all, The other day in chemistry class, we carried out several different redox reactions. In one set of the experiments, we reacted potassium permanganate with 3 different potassium halides (KCl, KBr, KI). this particular redox reaction also requires an acidic environment, so sulfuric acid...

Just need some idea of where to start on this one...am in my first Chemistry class and it is an intensive so we're not spending a lot of time on things. This one just has me stumped from the beginning so just some guidance on where to begin would be a huge help... Problem: Gold metal will...

Hi, I did a question once and in that Mno4- -> Mno2 but in another question it was Mno4- -> Mn2+ How can these equations defer and is there a way to know what the right side of the half equation is going to be when the left is given?

hi, Is there a way to figure out one side of a redox half equation when the other side is given? ex- Mn04- -> Mn2+

:confused:

totally stuck! hey guys and girls, I'm having some serious problems with this redox reaction titration thing i just did! Basically i titrated a sodium thiosulphate solution with potasium iodate(v), sulphuric acid, potassium iodide and some starch. I've worked out the molarity of my sodium...

This is the 2nd problem on a HW sheet I have. I don't have any particular problems with it but I'm just making sure I'm doing these right: Complete (add H20, H+ or OH- as appropriate) and balance the following equations. Show all half reactions. a. NO_3^- + Ag \rightarrow Ag^+ + NO_2...

Hi ppl. I'm asked a question: Iron filings are added to a solution containing the ions Cu2+, Fe2+, Fe3+, H30+ and Zn2+. Deduce what reactions occur from the standard electrode potentials. Is this simply asking me which will change Fe2+ to Fe3+ and vice-versa by reduction or oxidation do you...

Hello, Anyone know something about Molybdenum(V) ions? 1n our university, we instruct an experiment to students, in which ammonium molybdate (\displaystyle (NH_4)_2MoO_4) is reacted with tin chloride with hydrochloric acid. A redox reaction occurs, to my knowledge it should be like that...

Balance in basic (check my work) NO + MnO4- ------ NO3- + MnO2 4OH- + 4H+ + NO ---- NO3- + 2H2O + 4OH- 4OH- + 4H+ + MnO4- --- MnO2 + 2H2O + 4OH- Balanced with 5 e- on each side 2H2O + NO + MnO4- ----- NO3- + MnO2 + 8OH- Thanks Nautica

Check this Balance in an acidic solution Fe2+ + MnO4- ----- Fe3+ + Mn2+ (Fe2+ ---- Fe3+ + 1e-) x 7 7e- + 8H+ + MnO4- ----- Mn + 4H2O 8H+ + 7Fe2+ + MnO4- ----- 7Fe3+ + Mn + 4H2O Thanks Nautica

Hi I got the following redox-process: IO_3^{-} (aq) + HSO_3^{-}(aq) \rightarrow I_2(aq) + SO_4^{2-}(aq) How do I balance it? Any hits will be apriciated :) Sincerely Fred