MISSED THIS? Read Section 5.9 (Pages 193-201); Watch IWE 5.13. Assign oxidation states to each atom in each of the following species. PO, ³- 3- Express your answer as signed integers separated by a comma. ▸ View Available Hint(s) the oxidation states of P, O= Submit ▾ Part F VO4³- Express your answer as signed integers separated by a comma. View Available Hint(s) the oxidation states of V, O=

MISSED THIS? Read Section 5.9 (Pages 193-201); Watch IWE 5.13. Assign oxidation states to each atom in each of the following species. PO, ³- 3- Express your answer as signed integers separated by a comma. ▸ View Available Hint(s) the oxidation states of P, O= Submit ▾ Part F VO4³- Express your answer as signed integers separated by a comma. View Available Hint(s) the oxidation states of V, O=

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter20: Applications Of Oxidation/reduction Titrations

Section: Chapter Questions

Problem 20.28QAP

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Similar questions

A sample of impure tin of mass 0.535 g is dissolved in strong acidto give a solution of Sn2+. The solution is then titrated with a0.0448 M solution of NO3-, which is reduced to NO(g). Theequivalence point is reached upon the addition of 0.0344 L of theNO3- solution. Find the percent by mass of tin in the originalsample, assuming that it contains no other reducing agents.
A sample of impure KI weighing 0.600 g is dissolved in water, the solution acidified, and 25.00 mL of 0.0400 M KIO3 (an excess ) is added. The iodate is reduced to I2 and the iodide is oxidized to I, The I2 is boiled off, the solution cooled, and an excess of pure KI is added to react with the unused KIO3. The I2 produced is titrated with 40.38 mL of 0.1053 N thiosulfate. Write the equations for the reactions which occurred and calculate the percentage of KI in the sample.
A 5.00 mL sample of brandy was diluted to 1.00 L in a volumetricflask. The ethanol in 25.00 mL aliquot of the diluted solution wasdistilled into 50.0 mL of 0.02000 M K2Cr2O7and oxidized to aceticacid with heating.3C2H5OH + 2Cr2O72- + 16 H+ → 4 Cr3+ + 3CH3COOH + 11 H2OAfter cooling, 20.00 mL of 0.1253 M Fe3+ was pipetted into the flask. The excess Fe2+ was then titrated with 7.46 mL of standard K2Cr2O7to a diphenylamine sulfonic acid endpoint. Calculate the percent (w/v) ethanol (MW 46.07 g/mol) in the brandy.
When jump-starting a car with a dead battery, the ground jumper should be attached to a remote part of the engine block. Why?
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For Redox Analysis of Iron... ~0.02 M of potassium dichromate is prepared as titrant for dried unknown. ~.3 g of sample, 50ml of 6M HCl, 20mL SnCl2, 10 mL of saturated HgCl2 solution, 60 mL of 3M H2SO4, 15mL of concentrated H3PO4, 100mL DI water. HCl (+ heat in fumehood until samples dissolves), SnCl2 (added with pipet until solution changes from yellow to colorless/light green with 3 drops in excess), HgCl2 (after cooling), H2SO4, H3PO4, DI Water, is added to the sample solution with 8 drops of diphenylamine sulfonate indicator then titrated with the potassium dichromate to a violet blue endpoint. 4. Why is it necessary to carry out the reduction of iron and then the titration, before going on to the next sample 5. If you look carefully, there are pieces of tin metal on the bottom of the SnCl2 reagent solution. Why is it there?