An acidic solution of permanganate (MnO4–) ions can oxidize nitrous acid to nitrate ions. The products include dissolved Mn2+ ions. Write the chemical equations describing the oxidation of nitrous acid and the reduction of permanganate, and combine the two half-reactions to write a net ionic equation describing the overall redox reaction. Use the lowest whole-number coefficients possible and include states of matter. Define Reduction

The dilute sulfuric acid solution is electrolyzed with platinum electrodes with a current of 1.25 A for 8 hours. Calculate the volumes of gases formed under standard conditions by writing down the cell reaction.

The following skeletal oxidation-reduction reaction occurs under basic conditions. Write the balanced REDUCTION half reaction. Ag2O + I- = I2 + Ag

Write a balanced half-reaction for the oxidation of gaseous nitric oxide (NO) to nitrate ion symbols where appropriate. 0 (NO3) in acidic aqueous solution. Be sure to add physical state ローロ e 09 S

Write the balanced chemical equation for the spontaneous redox reaction. Include states of matter. Calculate the standard cell potential.  If the initial concentrations of Zn2+ and of OH– are 1.0 × 10–7 and 2.0 × 10–7, respectively, calculate the cell potential after the Zn2+ concentration has increased by a factor of 100. At this point, what percentage of the initial voltage remains?

Purification of chromium can be achieved by electrorefining chromium from an impure chromium anode onto a pure chromium cathode in an electrolytic cell. How many hours will it take to plate 10.0 kg of chromium onto the cathode if the current passed through the cell is held constant at 45.0 A? Assume the chromium in the electrolytic solution is present as Cr3 +.

A certain half-reaction has a standard reduction potential Eed=+0.45 V. An engineer proposes using this half-reaction at the anode of a galvanic cell that must provide at least 1.40 V of electrical power. The cell will operate under standard conditions. Note for advanced students: assume the engineer requires this half-reaction to happen at the anode of the cell. olo Is there a minimum standard reduction potential that the half-reaction used at the cathode of this cell can have? yes, there is a minimum. E red Ov Ar If so, check the "yes" box and calculate the minimum. Round your answer to 2 decimal places. If there is no lower limit, check the "no" box. no minimum Is there a maximum standard reduction potential that the half-reaction used at the cathode of this cell can have? E = Ov yes, there is a maximum. red If so, check the "yes" box and calculate the maximum. Round your answer to 2 decimal places. If there is no upper limit, check the "no" box. no maximum

Using a table of standard reductions potentials calculate the solubility product (Ksp) of the compound assigned to you. Write down the two balanced half-reactions and their voltages.  Label the anode, the cathode, which cell is the oxidation and reduction and whether it is positive or negative.  Indicate the direction of electron flow, the concentrations of all ionic species and the composition of the electrodes.  Calculate the voltage of the cell and then, using the voltage, calculate the Ksp of your compound. MUST SHOW ALL WORK!      Calculation of the Ksp of Ag2CO3   Half reactions:                   Overall Voltage:

Write a balanced half-reaction for the oxidation of aqueous hydrogen peroxide (H,02) to gaseous oxygen (02) in acidic aqueous solution. Be sure to add physical state symbols where appropriate.

A certain half-reaction has a standard reduction potential -0 red = = +0.90 V. An engineer proposes using this half-reaction at the cathode of a galvanic cell that must provide at least 0.70 V of electrical power. The cell will operate under standard conditions. Note for advanced students: assume the engineer requires this half-reaction to happen at the cathode of the cell. ロ→ロ 0 Is there a minimum standard reduction potential that the half-reaction used at the anode of this cell can have? yes, there is a minimum. ☐v red If so, check the "yes" box and calculate the minimum. Round your answer to 2 decimal places. If there is no lower limit, check the "no" box. no minimum Ś ? 0 Is there a maximum standard reduction potential that the half-reaction used at the anode of this cell can have? yes, there is a maximum. Ov red If so, check the "yes" box and calculate the maximum. Round your answer to 2 decimal places. If there is no upper limit, check the "no" box. no maximum E E = = X