Exam 18: Electrochemistry: The Quest for Clean Energy

The thermite reaction, shown below, is very exothermic and is often used as an initiator in fireworks. In this reaction, ________ is the reducing agent.

The magnitude of the charge on a mole of electrons is ________

Consider the voltaic cell based on the following reaction: Two students are assigned to measure the standard cell potential. Yvonne claims that both solutions of ions have to be at exactly 1.00 M concentration, but Zelda is sure that the measurement will be the same if the concentrations of the two solutions are equal, but not necessarily 1.00 M. What do you think? (The temperature is controlled at 25C, so that's not an issue.)

The following reaction occurs in basic solution. Identify the oxidizing agent. Note that the reaction equation is not balanced.

Chromium often is electroplated on other metals and even plastics to produce a shiny metallic appearance. How many grams of chromium would plate out from a solution of Cr(NO₃)₃ when 10 amps of current are passed through the electrolytic cell for 5.36 hours?

For a chemical reaction to be considered for use in a fuel cell, it is absolutely essential for the ________

Using the following data, determine the standard cell potential E for an electrochemical cell with zinc as the anode, lead as the cathode, and solutions of the respective ions. Half-reaction Standard Reduction Potential 0.763 0.126