Volumetric Analysis

Question 1

Define solution.

Answer 1

A solution is a completely perfect mixture of a solute and a solvent. In a solution, the particles of the solute are uniformly distributed throughout the solvent, i.e. the mixture is homogeneous.

Question 2

Define concentration

Answer 2

The concentration of a solution is the amount of solute that is dissolved in a given volume of solution.

Question 3

Give two characteristics of a primary standard.

Answer 3

Two of

• pure
• stable
• anhydrous
• no water loss
• not deliquescent
• not hygroscopic
• does not sublime
• high molecular mass (Mr)

Question 4

How do you make up a standard solution

Answer 4

Rinse the solute from the clock glass into a beaker containing deionised water. Dissolve the solute in the deionised water. Add through funnel into volumetric flask including rinsings. Add deionised water until the bottom of the meniscus is level with the mark read at eye level. Stopper and invert serval times.

Question 5

Why is it important to fill below the tap on a burette?

Answer 5

Gives a more accurate result

Question 6

How was the liquid adjusted to the zero Mark on the burette?

Answer 6

Fill below and add dropwise