3.2 Volumetric Analysis

Question 1

standard solution

Answer 1

a solution of accurately known solution

Question 2

preperation of standard solution

Answer 2

1. Accurately measure out required mass of primary standard
2. Dissolve in a small volume of solvent
3. Transfer solution and rinsings into volumetric flask
4. Make up to graduation mark
5. Stopper and invert to mix

Question 3

characteristics of a primary standard (4)

Answer 3

• be available in high state of purity
• be stable when solid and in solution
• be soluble
• have a reasonably high GFM

Question 4

how do you standardised a solution

Answer 4

Titrate x solution with standard solution/solution of known concentration of a suitable chemical

Question 5

types of volumetric analysis (4)

Answer 5

• Acid/base titrations
• Redox titrations
• Complexometric titrations
• Back titrations

Question 6

when is a compound not suitable for primary standard

Answer 6

• not available in high purity
• absorbs water
• absorbs CO2

Question 7

how to seperate two layers

Answer 7

seperating funnel