In a test of a new reference electrode, a chemist constructs a voltaic cell consisting of a Zn/Zn2+ half-cell and an H2/H+ half-cell under the following conditions: [Zn2+ ] = 0.041 M [H+ ]= 1.2 M partial pressure of H2 = 0.52 atm. Calculate Ecell at 298 K (enter to 3 decimal places). Zn2+ (aq) + 2e Zn(s) E° = 0.76 V 2H+ (aq) + 2e H2(g) E° = 0.00 V

A voltaic cell is constructed in which the anode is a Pb | Pb²+ half cell and the cathode is a l| 12 half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is: The cathode reaction is: + The net cell reaction is: + → ↑ In the external circuit, electrons migrate In the salt bridge, anions migrate + + Enter electrons as e + the 1₂ electrode the 1₂ compartment [ the Pb | Pb²+ electrode. the Pb | Pb2+ compartment.

A voltaic cell is constructed in which the anode is a Pb|Pb2+ half cell and the cathode is a I-|I2 half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is:     +              +     The cathode reaction is:     +              +     The net cell reaction is:     +              +     In the external circuit, electrons migrate _(from or to?)__ the I-|I2 electrode _(from or to?)__the  Pb|Pb2+ electrode.In the salt bridge, anions migrate _(from or to?)__ the Pb|Pb2+ compartment _(from or to?)__ the I-|I2 compartment.

Use an inactive electrode when needed. Consider the following cell reactions and its standard cell potential: 3 Hg22+(aq) + 2 Cr3+(aq) ⟶⟶2 Cr(s)  + 6 Hg2+(aq)       E°cell = -1.66 V a) Write the cell notation for the voltaic cell.  b) What are the stoichiometric number of moles of electrons delivered from the one electrode compartment to the other? c) Draw a diagram of the voltaic cell.  Label the anode and cathode compartments and the sign of each.Label what ions, gases, and solids are in each compartment.Label the electrode in each compartment. In other words, what is conducting electrons in and out of each compartment.Label the direction of electron flow.Label the salt bridge and what ionic compound is being used in the salt bridge.  Label the direction of the ion flow for the cation and anion of the salt bridge.