Module 1

Question 1

Two types of analytical methods

Answer 1

1. Classical
   - volumetric
   -gravimetric
   - distillation
2. Instrumental
   - spectroscopy
   - mass spec
   - separation
   -electrochemical

Question 2

Qualitative vs quantative chemical analysis

Answer 2

Qualitative: what is present in the sample
Quantative: how much is present in the sample

Question 3

What is the analytical process

Answer 3

1. Forming question
2. Selecting a procedure
3. Sampling
4. Sample preparation
5. Analysis
6. Reporting and interpretation
7. Drawing a conclusion

Question 4

How to asses the strength of acids

Answer 4

How much it has the ability to donate H+

Question 5

What does a small Ka imply

Answer 5

A weak acid

Question 6

What happens when ionic strength of a solution increases

Answer 6

_I ncrease in ionic strength means a net reduction in attractive forces between any ions in solution
-since ions are less attracted to each other there’s a smaller tendency for them to come together increasing the solubility of the solution

Question 7

What is ionic strength a measure of

Answer 7

Total concentration of ions in solution

Question 8

What are activity coefficients

Answer 8

The activity of a species related to its molar concentration by a factor called activity coefficient

Question 9

What is fraction of dissociation and equation

Answer 9

Fraction of an acid HA in the form of A-
Alpha= x/F

Question 10

What is formal concentration

Answer 10

The total number of moles of a compound dissolved per L of solution