A 25.00cm3 of potassium dichromate(K2Cr2O7) solution are added to an acidified aqueous solution of potassium iodide(present in excess). The Iodine was then liberated according to the equation K2Cr2O7(aq) + 14H+(aq) + KI(aq) → K+(aq) + Cr3+(aq) + H2O(l) + I2(aq) required 19.63cm3 of a 0.1478MNa2S2O3 for complete reaction. The equation for the reaction of between Na2S2O3 and I2 is I2 +(aq) + Na2S2SO3(aq) → Na2S4O6(aq) + NaI(aq) Calculate the concentration of potassium dichromate (only 4 decimal places). ________Mol/L

A 25.00cm3 of potassium dichromate(K2Cr2O7) solution are added to an acidified aqueous solution of potassium iodide(present in excess). The Iodine was then liberated according to the equation K2Cr2O7(aq) + 14H+(aq) + KI(aq) → K+(aq) + Cr3+(aq) + H2O(l) + I2(aq) required 19.63cm3 of a 0.1478MNa2S2O3 for complete reaction. The equation for the reaction of between Na2S2O3 and I2 is I2 +(aq) + Na2S2SO3(aq) → Na2S4O6(aq) + NaI(aq) Calculate the concentration of potassium dichromate (only 4 decimal places). ________Mol/L

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 80AP

See similar textbooks

Similar questions

6. A stock solution containing 25% w/v of chlorhexidine is used to prepare an antiseptic such that when the antiseptic is diluted 1 in 25, a 1 in 500 wash solution is obtained which is ready for use by the patient. What volume (ml) of the stock solution is required to prepare 5 litres of the antiseptic to fulfil a bulk manufacturing order?
In the laboratory, a student was tasked to prepare a stock solution of HCl for titration. The available analytical grade HCl solution in the stock room was labelled 35% w/v HCl. The student proceeded to prepare the stock solution by mixing 10mL of the HCl solution with 490mL of analytical grade water. Then, the solution was further diluted by adding 5mL, since the total volume of the solution did not reach the 500mL etched mark on the volumetric flask. To prepare the titrant, the student mixed 10mL of the stock solution, then added 40mL of analytical grade water. The titrant was subsequently used to determine the concentration of two titrand. *Use the table as a reference 1. What is the normality of the available HCl reagent in the stock room?* 5.08 N 10.15 N 20.3 N 11.0 N None of the choices 2. What is the normality of the stock solution of HCl?* 0.09N 0.10N 0.11N 0.12N None of the choices 3. What is the normality of the titrant?*…
A sample containing chlorophenol, C6H4ClOH, was analysed by gravimetric analysis. A 0.783-g of this sample goes through a chemical process allowing the chlorine in the chlorophenol to precipitate as silver chloride, weighing 0.271 g. Calculate the % (wt/wt) of the chlorophenol in the sample, assuming that chlorophenol is the only source of chlorine in the sample. Provide your answer to two decimal places and without units. Avoid using scientific notation.
A stock solution of potassium permanganate (KMn04) was prepared by dissolving 13.0g KMn04 with DI in a 100ml volumetric flask and diluting to the calibration mark. Determine the molarity of the solution.
Electrolytic manganese dioxide can be prepared from manganese carbonate ore by crushing,milling and leaching the ore in sulphuric acid. Manganese sulphate is crystallised from thesolution, redissolved and electrolysed to give the manganese dioxide.If the crystallisation were performed in a 30m3 tank and the concentration of the solutionentering the tank were 160 grams per litre and left the tank at 40 grams per litre, how muchMnSO4.5H2O would be produced.
ethylene oxide is produced by oxidation of ethylene 100 kmol of ethylene and 100 kmol of o2 are charged to a reactor.the % conversion of ethylene is 85 and%yield of ethylene oxide is 94.12 .calculate the composition of product stream leaving the reactor .the reactions takes place are
What is the concentration of ions in the soil solution after fertilizer application? Suppose that 122 pounds of K+ were applied per acre, then a gentle rain soaked the top 10 inches of soil to field capacity, which for the given soil was about 16% water by volume. If the K+ was applied as KCl, it is plausible that it all dissolved and distributed relatively uniformly with the infiltrating water. If so, then what was the K+ concentration in the soil solution in mol K+/L solution? Note that the volume can be computed like we do for an acre-furrow-slice (AFS), as area times depth. This is going to be a relatively small number, so please report your answer in mol K+/L solution to at least 5 decimal places.
In the Deacon process for the manufacture of chlorine, HCl and O2 react toform Cl2 and H2O, Sufficient air (21 mol% O2, 79% N2) is fed to provide 35% excess oxygen and the fractional conversion of HCl is 85%. (a) Calculate the mole fractions of the product stream components, usingatomic species balances in your calculation. (b) Again calculate the mole fractions of the product stream components,but use the extent of reaction in the calculation.
discuss some ways in which the concentration of asolution can be expressed, and the kinds of informationwe can derive from the different units of measure.
In the industrial synthesis of aspirin, 200 kg of salicyclic acid, C7H6O3 and 150 kg of acetic anhydride (CH3CO)2O, form acetylsalicylic acid, C9H8O4, (aspirin) and acetic acid, C2H4O2. In a manufacturing process, 200 kg of aspirin are produced from 200 kg of impure salicyclic acid and 150 kg of acetic anhydride. The salicylic acid is the limiting reagent. Calculate the purity of the salicyclic acid. How many kg of excess reagent are left over, assuming there are no side reactions between the impurities in the limiting reagent and the excess reagent?
From the sequential hydrolysis of ammonia borane in 10 mL aqueous solution at 25 ºC and 1 atm with 2 mM Rh catalysis, 730.4 mL H2 was obtained in 8 hours. What is the TON of the catalyst used in the reaction?
Was the gradual color change observed when the sodium thiosulfate (Na2S2O3) crystal was added to the aqueous solution of KI/12 in Station Cevidence of a chemical or physical change?