Chapter 12 - Galvanic cells and standard electrode potentials Flashcards
What is the area of science about the connections between chemistry and electricity called?
Electrochemistry.
What is an electrode?
The conductor that connects the external electrical circuit to the solution of the galvanic cell.
What is a galvanic cell?
A device in which a chemical reaction occurs in such a way that it generates electricity.
What is the purpose of a salt bridge in a galvanic cell?
To make galvanic cells operate. They allow the migration of ions between two electrolytes in a galvanic cell to maintain electrical neutrality in the cell solution.
What is an electrolyte?
A substance that in solution or in the molten state conducts electricity.
What is a cathode?
The electrode at which reduction occurs.
What are the chemical reactions occur at the electrodes in a galvanic cell called?
Electrode process or electrode reactions.
What is a salt bridge?
A device that provides electrical contact between two solutions in a galvanic cell.
What is the standard electrode potential of an electrode?
The potential of that electrode in its standard state relative to the standard hydrogen electrode. This is also sometimes called standard redox potentials.
What is an anode?
The electrode at which oxidation occurs.
What is the electromotive force or EMF of a galvanic cell?
The potential difference in voltage across the electrode of the cell when a negligibly small current is being drawn. The maximum voltage the cell can deliver.
When a redox reaction is spontaneous?
A redox reaction is spontaneous if it has a positive standard cell voltage.
What is the trend between the reactivity of metals and and standard electrode potential?
The reactivity of metals decreases as standard electrode potential increases.
What is the standard state for chemical measurements such as electrode potentials?
Electrode potentials is solute present at 1.000 mol L-1 and any gas present to be at a pressure of 100.0 kPa.
