Unit 3: Volumetric Titrations

Question 1

Standard Solution

Answer 1

Standard solutions are solutions with an accurately known concentration.

Question 2

How to make standard solutions

Answer 2

• Dissolve an accurately measured mass of solid in a small volume of deionised water in a beaker
• Transfer the solution to a standard flask, rinsing the beaker carefully
• make up the solution to the mark on the stanadard flask, using a dropper for the last few drops so that the bottom of the meniscus is touching the line on the flask.

Question 3

Volumetric analysis

Answer 3

Volumetric analysis uses a solution of accuratley known concentration to determine the exact concentration of another substance using titration.

Question 4

Titration

Answer 4

Titration is used to accurately determine the volume of solution to reach the end-point of a reaction.
Indiacator is used to show when the end-point has reached

Question 5

Titrartion involving acidified permanganate solution

Answer 5

Titrations using acidified

permanganate solution are self-indicating as purple permanganate turns colourless as the permanganate ions are reduced.