Electrochemistry Lecture Notes

A set of fill-in-the-blank flashcards designed for studying key concepts and information related to electrochemistry.

Electrochemistry is a branch of chemistry that deals with __.

chemical reactions produced by passing electric current through an electrolyte.

A __ is a material that allows free flow of electricity.

conductor.

Examples of conductors include all metals, graphite, and __.

fused salts.

Insulators are materials which do not conduct __.

electrical current.

Electrode is a material that conducts __.

electrons.

The __ is the electrode at which oxidation occurs.

anode.

The __ is the electrode at which reduction occurs.

cathode.

A cell consists of two __ that are connected through one wire.

half cells.

A __ holds solutions of a salt to maintain electro neutrality and minimize liquid junction potential.

salt bridge.

In an electrolytic cell, __ energy is converted to chemical energy.

Electrical.

In an electrochemical cell, chemical energy is converted to __ energy.

electrical.

The anode in an electrolytic cell carries a __ charge.

+ve.

The cathode in an electrochemical cell carries a __ charge.

+ve.

Electrons are supplied to the cell from an __ source in an electrolytic cell.

external.

In an electrochemical cell, the amount of electricity is measured by a __.

potentiometer.

At the anode in the electrolysis of HCl, __ occurs.

oxidation.

At the cathode in the electrolysis of HCl, __ occurs.

reduction.

The net cell reaction in the electrochemical cell is represented as __.

Cu2+ + Zn → Zn2+ + Cu.

Oxidation potential refers to the tendency of an electrode to __ electrons.

lose.

Reduction potential refers to the tendency of an electrode to __ electrons.

gain.

Standard electrode potential is defined at a concentration of __.

1M.

Saturated calomel electrode is an example of a __ electrode.

reference.

The quinhydrone electrode is used to measure __ concentration.

hydrogen ion.

When two solutions of different pH values are separated by a thin glass membrane, a __ develops across the membrane.

potential difference.

Electrode potential can be measured using a __ electrode.

reference.

The standard hydrogen electrode is arbitrarily assigned a potential of __ volts.

zero.

In a lead-acid battery, the positive terminal or cathode is coated with __.

lead dioxide.

The overall cell reaction of a lead-acid battery produces __.

PbSO4.

A primary battery is also known as a __ battery.

non-rechargeable.

Nickel-Cadmium batteries do not evolve __ during charging and discharging.

gas.

Lithium batteries are characterized by high specific energy and __ life.

high cycle.

Fuel cells convert the chemical energy of fuel into __ energy.

electrical.

The overall reaction in a hydrogen-oxygen fuel cell produces __.

water.

The Nernst equation describes the relationship between electrode potential and __ concentration.

ion.

A __ battery is one that can be recharged.

secondary.

Lithium-Sulphur batteries operate effectively at __ temperatures.

high.

The difference in potential generated by a glass electrode is proportional to the difference in __ of the test solution.

pH.

The standard electrode potentials help in calculating the __ of a cell.

standard emf.

Measuring the electrode potential of an unknown electrode requires coupling it with a __ electrode.

reference.

In electrochemical cells, the tendency of a reaction to occur spontaneously can be predicted by checking if the __ value is positive.

Eo.