Lesson: Degree of Dissociation Chemistry • Third Year of Secondary School

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In this lesson, we will learn how to define and calculate the degree of dissociation of a weak acid and use it to derive Ostwald’s law of dilution.

Students will be able to

explain and calculate the degree of dissociation of a weak acid,
write equations for the dissociation constant (Ka) in terms of volume and degree of dissociation,
state and derive Ostwald’s law of dilution and the relationship between Ka, degree of dissociation, the volume,
calculate Ka for a weak acid from the initial concentration and degree of dissociation and vice versa,
explain the relationship between the degree of dissociation and dilution (either through volume or concentration),
explain the effect the degree of dissociation of electrolytes has on the electrical conductivity of a solution.