9. Consider the unbalanced chemical reaction equation H3O+ +I+MnO4 → I2 + MnO2 + H2OWhat is the balanced chemical equation for the reaction in an acidic medium? 8H3O+ + 6I¯ + 2MnO4¯ → 3I2 + 2MnO2 + 12H2O 8H3O+ + 6I¯ + 2MnO4¯ → 3I2 + 2MnO2 + 4H2O 4H3O+ + 21¯ + MnO4¯ → I2 + MnO2 + 6H2O 4H3O+ + 21¯ + MnO4 → I2 + MnO2 + 2H2O

9. Consider the unbalanced chemical reaction equation H3O+ +I+MnO4 → I2 + MnO2 + H2OWhat is the balanced chemical equation for the reaction in an acidic medium? 8H3O+ + 6I¯ + 2MnO4¯ → 3I2 + 2MnO2 + 12H2O 8H3O+ + 6I¯ + 2MnO4¯ → 3I2 + 2MnO2 + 4H2O 4H3O+ + 21¯ + MnO4¯ → I2 + MnO2 + 6H2O 4H3O+ + 21¯ + MnO4 → I2 + MnO2 + 2H2O

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 12.1PAE: Identify the first chemical step in the production of Portland cement. How is this reaction related...

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Identify the first chemical step in the production of Portland cement. How is this reaction related to the chemistry that takes place in the carbonation of concrete?
A chemical engineering student is studying the effect of pH on the corrosion of iron. Ellie following data are collected: Corrosion Rate (mm/year) ph 0.03 13.00 0.06 12.00 0.16 11.00 0.22 10.00 0.25 9.00 0.25 8.00 0.25 7.00 0.25 6.00 0.25 5.00 0.27 4.00 0.37 3.00 0.38 2.80 0.63 2.80 1.00 2.80 Plot corrosion rate vs. pH. (HINT: Label the x axis with decreasing pH.) (a) How would you describe the dependence of corrosion on pH? (b) When the pH goes below 3, bubbles appear in the solution. What change takes place in the reduction half-reaction at low pH? (c) How do you explain the shape of the curve at the lowest pH? (Based on a graph in the Kirk-Otbmer Encyclopedia of Chemical Technology, 4th ed., vol 7. New York: John Wiley & Sons, p. 559.)
What characterizes an electrolytic cell? What is an ampere? When the current applied to an electrolytic cell is multiplied by the time in seconds, what quantity is determined? How is this quantity converted to moles of electrons required? How are moles of electrons required converted to moles of metal plated out? What does plating mean? How do you predict the cathode and the anode half-reactions in an electrolytic cell? Why is the electrolysis of molten salts much easier to predict in terms of what occurs at the anode and cathode than the electrolysis of aqueous dissolved salts? What is overvoltage?
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When aluminum foil is placed in hydrochloric acid, nothing happens for the first 30 seconds or so. This is followed by vigorous bubbling and the eventual disappearance of the foil. Explain these observations.
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The photographs below (a) show what occurs when a solution of iron(III) nitrate is treated with a few drops of aqueous potassium thiocyanate. The nearly colorless iron(III) ion is converted to a red [Fe(H2O)5SCN)2+ ion. (This is a classic test for the presence of iron(III) ions in solution.) [Fe(H2O)6]3+(aq) + SCN(aq) [Fe(H2O)5SCN]2+(aq) + H2O() (a) As more KSCN is added to the solution, the color becomes even more red. Explain this observation. (b) Silver ions form a white precipitate with SCN ions. What would you observe on adding a few drops of aqueous silver nitrate to a red solution of [Fe(H2O)5 SCN]+ ions? Explain your observation.
An aqueous solution of an unknown salt of vanadium is electrolyzed by a current of 2.50 amps for 1.90 hours. The electroplating is carried out with an efficiency of 95.0%, resulting in a deposit of 2.850 g of vanadium. a How many faradays are required to deposit the vanadium? b What is the charge on the vanadium ions (based on your calculations)?
Write a balanced chemical equation based on the following description: aqueous iridium(III) bromide reacts with aqueous silver acetate to form solid silver bromide and aqueous iridium(III) acetate a) Write a balanced chemical reaction equation for the above reaction. (1 pt) b) Determine the type of reaction (decomposition, single-displacement, etc.) for the above reaction. (1 pt)
We have talked about in lecture about metamorphic grade, and about the difference between progradeand retrograde mineral reactions. One such possible mineral reaction is as follows:orthoclase + sillimanite + H2O = muscovite + quartz 3a: Write a balanced chemical reaction for the above minerals, given that the formula for muscovite isK2Al6Si6O20(OH)4 3b: Indicate which reaction direction (left to right, right to left) is the prograde direction, and explainwhy you think that.
How many seconds does it take to deposit 1.63 g of Ni ona decorative drawer handle when 13.7 A is passed through a Ni(NO3)2solution?
The Haber process is the principal industrial route for converting nitrogen into ammonia: N21g2 + 3 H21g2 ¡ 2 NH31g2Calculate the standard emf of the Haber process at room temperature