Separations And Purifications Flashcards Preview

Organic Chemistry > Separations And Purifications > Flashcards

Flashcards in Separations And Purifications Deck (8)
Loading flashcards...
1
Q

To protonate (add H) we need

A

Acidic environment

2
Q

To deprotonate (remove H) we need

A

Basic environment

3
Q

What are paper and thin layer chromatography used for?

A

For identifying compound by measuring the distance traveled by sample.

Rf (retention factor) = dis traveled by molecule/dis traveled by solvent

4
Q

What are the phases like paper/TLC and reverse phase chromatography?

A

Paper/TLC:

Stationary Phase: Polar
Mobile Phase: Non polar

Reverse-Phase:

Stationary Phase: non Polar
Mobile Phase: polar

5
Q

What is gel filtration used for?

A

Used for identifying compounds based on their size. The large the compound is the slowest it will travel i.e. smallest compounds will travel the most distance

6
Q

What is true about amine (NH3+)?

A

Protonated or acid form has positive charge
Deprotonated is neutral

7
Q

What’s true about carboxylic acid?

A

Protonated form is neutral
Deprotonated form is negatively charged

8
Q

What’s isolelectric point (pi)?

A

It’s the pH when the compound has net charge of 0