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What is the correct cell notation for the redox reaction 3Pb2 plus aq plus 2Cr s 3Pb s plus 2Cr3 plus aq?
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∙ 13y ago
Cr(s) | Cr3+(aq) Pb2+(aq) | Pb(s)
Wiki User
∙ 13y ago
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What element is reduced in this reaction cr2o7 3hno2 5h-2cr3 3no3 4h2o?
Chromium
Chemical reaction between iron and potassium dichromate?
Cr2O72- + 6Fe2++ 14H+ --> 2Cr3+ + 6Fe3+ + 7H2O
What is the correct formula for the ionic compound formed between chromium and chloride?
Chromium (II) chloride = CrCl2Chromium (III) chloride = CrCl3 Chromium (IV) chloride = CrCl4
What is the Reaction of k2cr2o7 with so2?
The two relevant half-equations are: [1] SO2 + 2H2O --> (SO4)2- + 4H+ + 2e [2] (Cr2O7)2- + 14H+ + 6e --> 2Cr3+ + 7H2O Multiply [1] by 3; add together; cancel down H+ and H2O. Giving: 3SO2 + (Cr2O7)2- + 2H+ --> 3(SO4)2- + 2Cr3+ + H2O (The potassium ions are spectator ions) Edit: Can the answerer please give the complete equation? The ionic one is pretty "obvious"; I would prefer the full one. Thanks
What is the new oxidation number for cr2o7-2 plus 8h plus 3so3-2 2cr3 plus 3sov-2 plus 4h20?
oxidation number of S is +6.It oxidize into SO4 ^-2
What is the reaction of acidified pot dichromate with Hydrogen Sulphide?
Cr2O72-(aq) + 3SO2 (g) + 2H+(aq)= 2Cr3+ (aq) + 3SO4 2- (aq) H2O (l)
Why does a colour change takes place while titrating mohr's salt against potassium dichromate?
From orange to (yellowish) green: It is a powerfull oxidant, used to titrate Fe2+ from Mohr's salt to the oxidised form Fe3+ by the following: Cr2O72−(aq) + 14H+ + 6e− → 2Cr3+(aq) + 7H2O
How many milliliters of 0.325 N HCl are nescessary to reduce 37.6 milliliters of a 0.526 N solution of K2Cr2O7?
First:Comparing the electropotential values of both redox couples (being equal, see below 1. and 2.)AND considering that Cl2 gas might escape the mixture giving toxic fumes,it does NOT look a good titration method.2Cl- --> Cl2,g + 2e- (delta)Eo= -1.36VCr2O72- + 14H+ + 6e- --> 2Cr3+ + 7H2O (delta)Eo= +1.36VSecond:There is no exact answer possible because the titration end point can never be established, you'll never know when the last Cl2 is escaped, and there is no sharp (sudden) change in colour, and the reaction at the endpoint is very slow.Third: The answer is 60.9 mLThe equivalent point (theorethical end point) can be calculated as follows:mEq reductor (HCl) = mEq oxidator (K2Cr2O7)0.325 (mEq/mL HCl) * VHCl (mL) = 0.526 (mEq/mL K2Cr2O7) * 37.6 (mL K2Cr2O7) So VHCl (mL) = 0.526 (mEq/mL K2Cr2O7) * 37.6 (mL K2Cr2O7) / 0.325 (mEq/mL HCl) = 60.854 = 60.9 mL
What is the net ionic equation for chromium sulfate and ammonium carbonate Cr2SO43 NH42CO3also what are the spectator ions of this equation?
net ionic equation only has the ions that become a precipitate: 2Cr3+(aq)+3CO32-(aq)--->Cr2(CO3)3(s) spectator ions are the ones that do not make a precipitate: SO42-,NH4+ no precipitate(combines to form another aqueous solution)=no reaction. hope this helps
What is the formula name for Cr C2H3O2 3?
chromium (III) acetate at least this is what masteing chemistry told me after I guessed wrong three times I however am not to sure because my chem. teacher "doctor" Ott did not bother teaching me how to figure this out before she assigned it for homewor
