Lecture 3 Flashcards
Polyprotic bases can do what?
accept more than one H+ ion
When reacting an acid and base, The point at which colour change occurs is what?
end point
When reacting an acid and base,
What is the point when enough titrant has been added to react exactly with the substance in solution being titrated
equivalence point
What is the point at which the acid base reaction mixture reaches pH 7.0
Neutral point
In pH terms, Ka < Kb means what?
Basic
In pH terms Ka = Kb means what?
Neutral
In pH terms Ka > Kb means what?
Acidic
True or false A polyprotic titration will have two end-points.
False
For a polyprotic acid, two or more inflection points can be obtained on a titration curve if what circumstances are met?
The successive pKa values are well spread
pH range of an indicator is defined by?
pKa ± 1.0
True or false
An indicator with the pH range of the colour change of which coincides with the steep portion of the titration curve, is suitable
True
True or false
If a polyprotic specie is titrated and two inflection points are obtained, it is possible to use 2 different colour indicators to determine both end points.
True
