UNIT 2 Titration and Normality

Question 1

What is the use of titrations?

Answer 1

determine the quantity of reagent f known concentration that is required to react completely with an analyte

Question 2

What is needed to be know for a titration?

Answer 2

Concentration of reagent –> standard solution

Question 3

What is equilibrium?

Answer 3

When the reagents have reacted completely with analytes

–> need an indicator to know when that has happened

Question 4

Equivalence point

Answer 4

Equal amounts has been sonsumed between the titrant and analyte

Question 5

Overshoot

Answer 5

Add extra volume–> extra moles and notaccurate

Question 6

End point

Answer 6

Physical chaneg has occured associated

Question 7

Titration error

Answer 7

Et=V(endopint)-V(eq point)

Question 8

What is a primary standard?

Answer 8

Ultrapure chemical compounds that is used fro reliability of titration

Question 9

What is a secondary solution?

Answer 9

compound whose purity has been determined by chemical analysis

Question 10

How do you make a secondary solution?

Answer 10

Titrated with primary standard in order to determine exact concentration and make it a standard

Question 11

What is back titration?

Answer 11

Adding excess of standard solution to consume an analyte is determined by titration with a second standard solution

Question 12

What is an example of back titration?

Answer 12

Iodine Value:

• iodine saturates the double bond
• determine the amount of O2 that saturated the double bond
• add excess and titrate what is left –> find moles that is not consumed

Question 13

What is normaility?

Answer 13

Expresses solution concentration

Number of equivalents contained in 1L of solution

Question 14

What is the indicator?

Answer 14

Added to analyte solution to produce observable signaling of the endpoint

Question 15

What is Gravimetric titration?

Answer 15

Mass of titrant s measured rather than the volume

Question 16

What is the equation to determine the Volume of the concentrated solution of an aliquot?

Answer 16

Vc=Vd*Cd/Cc

Question 17

Preparing diluted aliquots?

Answer 17

Amount of solute from concentrated solution = amount of solution in diluted solution

Question 18

What is the simple way to describe Normality?

Answer 18

eq standard analyte=# eq standard reagent added

Question 19

What is the disadvantage of Normality?

Answer 19

Different definitions for the equivalent

Neutralization: Amount of substance that reacts with or supplies 1mol H ions