9. The second-order reaction, 2 Mn(CO)s → Mn2(CO)10 has a rate constant equal to 3.0 x 10° M's at 25°C. If the initial concentration of Mn(CO)s is 1.0 × 10 M, how long will it take for 90.% of the reactant to disappear?
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- A lead storage battery delivers a current of 6 A for onw hour and 22 minutes at a voltage of 12 V. Pb(s) + PbO2(s) + 2SO4^2-(aq) + 4H+ = 2PbSO4(s) + 2H2O a. How many grams of Pb are converted to PbSO4? b. How much electrical energy is produced in kilowatt hours?Black-and-white photographic film is coated with silver halides. Because silver is expensive, the manufacturer monitors the Ag⁺ content of the waste stream, [Ag⁺]ᵥᵥₐₛₜₑ, from the plantwith an Ag-selective electrode at 25°C. A stream of known Ag⁺ concentration, [Ag⁺](standard), is passed over the electrode inturn with the waste stream and the data recorded by a computer.(a) Write the equations relating the nonstandard cell potential tothe standard cell potential and [Ag⁺] for each solution.(b) Combine these into a single equation to find [Ag⁺]ᵥᵥₐₛₜₑ.(c) Rewrite the equation from part (b) to find [Ag⁺]ᵥᵥₐₛₜₑ in ng/L.(d) If Eᵥᵥₐₛₜₑ is 0.003 V higher than E(standard), and the standard so-lution contains 1000. ng/L, what is [Ag⁺]ᵥᵥₐₛₜₑ?(e) Rewrite the equation in part (b) to find [Ag⁺]ᵥᵥₐₛₜₑ for a sys-tem in which T changes and Tᵥᵥₐₛₜₑ and T(standard) may be different.. Consider a galvanic cell with the anode containing a Zn metal electrode and a 0.10 M Zn(NO3)2solution and the other half-cell containing a Sn metal electrode and a 0.10 M Sn(NO3)2 solution. If themeasured Ecell value is +650 mV and the Zn2+/Zn reduction potential is assumed to be −790 mV, what isthe Sn2+/Sn reduction potential? Show all work.
- For a standard voltaic cell comprised of a Cu2+|Cu electrode and a Fe3+|Fe2+electrode, what is the cell potential, in volts?On the illustration of a generic cell for In/Zn electrodes immersed in their salt solutions Use the Standard Electrode Potential Table. to calculate Eocell (follow this link to find the electrode potential table) https://openstax.org/books/chemistry-atoms-first-2e/pages/l-standard-electrode-half-cell-potentialsA lead storage battery delivers a current of 6 A for one hour and 22 minutes at a voltage of 12 V.Pb(s) + PbO2(s) + 2SO42-(aq) + 4H+ → 2PbSO4 (s) + 2H2Oa. How many grams of Pb are converted to PbSO4?b. How much electrical energy is produced in kilowatt hours?
- A thin circular-disk earring 4.00 cm in diameter is platedwith a coating of gold 0.25 mm thick from an Au³⁺ bath.(a) How many days does it take to deposit the gold on one sideof one earring if the current is 0.013 A (d of gold =19.3 g/cm³)?(b) How many days does it take to deposit the gold on both sidesof the pair of earrings?(c) If the price of gold is $320 per troy ounce (31.10 g), what is the total cost of the gold plating?At 25C, you conduct a titration of 20.00 mL of a 0.0400 M AgNO3 solution with a 0.050 M NaI solution within the following cell: Saturated Calomel Electrode | Titration solution | Ag(s) for the cell as writted, what is the voltage after the addition of 10.00 mL of the NaI sooution? The reduction potential for the saturated calomel electrode is E=0.241 V. The standard reduction potential for the reaction: Ag++e- ® Ag(s) E0= 0.79993V. The solubility constant of AgI is Ksp=8.3x10-17 Note: the cell potential could be negative since the condditions are non-standard ones. a)0.169 b)0.354 c)0.235 d)2.360 e)0.441Electrochemical Equilibria: Electrochemical CellsHydrogen fuel cells produce electricity by utilizing a redox reaction between hydrogen gasand oxygen gas without the need for combustion. Oxidation of hydrogen gas to waterhappens at the anode, while reduction of oxygen gas to hydroxide happens at the cathode.A certain hydrogen fuel cell consumes pure hydrogen at the anode side at 80 kPa and usesair at 1 bar as the oxygen source in the cathode side. This fuel cell operates at 30 oC.Assuming no side reactions due to the existence of nitrogen in the cathode, answer thefollowing:a) What is the overall reaction? How is the overall reaction it different fromhydrogen combustion?b) Determine the standard cell potential, Eocellc) Determine the actual cell potential, Ecelld) What can you say about the spontaneity of the actual fuel cell reaction at lowtemperatures? Will spontaneity decrease or increase at lower temperatures?
- For a standard voltaic cell comprised of a Cu2+|Cu electrode and a Fe2+|Fe electrode, what is the cell potential, in volts?Consider a galvanic cell consisting of the Cr3+/Cr (Eo=-0.74 V) and the Ag+/Ag (Eo=+0.8 V) systems in the half-cells. a) What is the standard cell potential, Eocell, for the galvanic cell in volts (V) and millivolts (mV)?In the 2018 Olympics, a total of 340 gold medals were given to players. An Olympic gold medal have at least 6 g of Au (gold) and 92.5% silver. Assume each medal is prepared by layer a 60-mm diameter and 3-mm thick, gold-free silver alloy disk with gold thru electrolytic deposition by means of a gold (III) solution, identify time required (hrs) to polish all the gold medals with the given gold content and has a steady current of 50A. (Molar mass = 196.97 g/mol)