What is the oxidation number of chromium in Fe2(Cr207)3? Multiple Choice
What is the oxidation number of chromium in Fe2(Cr207)3? Multiple Choice Ο Ο Ο Ο
3. Highly oxidized chromium ("hexavalent chromium") in the form of K Cr207, potassium dichromate, can be converted to less toxic, still useful for chromium plating K Cr04, potassium chromate by heating it with potash, K2CO3. KCr207 + K CO3 à 2K CrO4 + CO What mass of potassium chromate is produced by the reduction of 100 g of potassium dichromate? [Molar masses: K, 39.0983 g: Cr, 51.996 g. 1 lb - 453.592 g]
3A%252F Saved In which of the following choices is the oxidation number incorrect? Multiple Choice Fe3-lac)oxidation number = 3+ Tag: oxidation number 1- Cl2(s): oxidation number = 1- < Prev 53 of 60 Next > search O BE
QUESTION 25 What is the oxidation number for the chromium atom in the following molecules? K2Cr204: Cro32
QUESTION 16 Compute the oxidation number of the chromium in Na2SO3
Multiple choice: 3. (5 pts.) The oxidation of copper metal by iron (III) chloride used in the etching of circuit boards goes as follows: 2 Fe3+ (aq) + Cu (s) → 2 Fe2+ (aq) + Cu2+ (aq) The reduction potential for the Fe3+/Fe2+ and Cu2+/Cu pair are +0.772 V and -0.340 V, respectively. The concentrations are [Fe3+] = 1.24 M, [Fe2+] = .248 M, and [Cu2+] = .342 M. The electrical potential for this cell at 25.00C is: (a) +1.057...
3. What is the oxidation state of chromium in PbCrO4? 4. Why might it not be necessary to perform a confirmation test for certain Group III metal ions?
Using the molar ratio of the redox reaction between chromium as potassium dichromate and Fe2+ as ferrous ammonium sulfate, how can we determine how much of the ferrous ammonium sulfate (solid) should be added to a 20mL sample of wastewater containing 600mg/L of chromium (from potassium dichromate) in order to reduce the hexavalent chromium to trivalent chromium? Based on 6Fe2 + Cr2O7 2- + 14H+ - - > 2Cr 3+ + 7H2O + 6Fe 3+
What is ∆G0 per mole of chromate ions for the reduction of chromate to chromium hydroxide by oxidation of Fe to Fe2+? (in kJ, to ones place, dont write in units) Please show work!!
Chromium forms a tetrahedral complex with Cl- that has a charge of -1. What is the coordination number and oxidation state of the chromium atom? coordination number: oxidation state: