EXP11 - Introduction Objective The objective of this...

Introduction
Objective:
The objective of this experiment is to find the concentration of the
unknowns.
Theory:
Electrical conductance occurs in many different materials, either by
the flow of electrons (as in electrolytes) or by the movement of other
charged species (as in electrolytes or semiconductors). Electrolytic
conductance involves the transport of anions to the anode and cations
to the cathode while electrons are transferred to and from the ions at the
electrode surfaces to complete the current path.
The conductance of a solution varies with the number, size and
charge of the ions and also with some characteristics of the solvent,
such as viscosity. The ability of a solution to conduct electric current is
expressed in terms its conductivity or conductance (reciprocal of
resistance). Conductometric titration involves measurement of the
solution after each addition of the titrant. After correcting for the volume
change, the conductance readings are plotted as a function of the
volume of the titrant added, and the equivalence point is determined by
extrapolation of the straight-line portions of the curve.