Experiment 2: Simple Distillation

[TRUE/FALSE] Water’s boiling point is higher than most organic solvents

TRUE

What is the ideal difference between two solvents to have a successful separation?

20 deg

Involves the process of separating two or more liquids that are homogenously mixed but with different boiling points

Simple Distillation

[TRUE/FALSE] The liquid with the highest boiling point turns to vapor last

TRUE

[TRUE/FALSE] The liquid with lowest boiling point will be collected first

TRUE

What happens to the concentration of the lowest boiling component as distillation progresses?

It will steadily decrease

Why is the 2nd fraction considered to be impure?

Because it tends to be a mixture of the first and second liquid. That’s why it is usually discarded

these are small, insoluble, porous stones that are made from calcium carbonate

Boiling chips

Aside from calcium carbonate, boiling chips can be also made up of?

Silicon carbide

[BONUS] In the experiment, where did we get the boiling chips?

sa binasag ng kagrupo mong evap dish kimi

Boiling chips have this inside which provides cavities to trap air and provide spaces for bubbles of solvent

Pores

The bubbles ensure ____________ , prevent ____________, and boiling over the loss of solution

boiling; bumping

What part of the thermometer should be placed right below the side arm? of the distillation flask

Bulb

Why does the bulb of the thermometer needed to be placed there?

to get an accurate measurement

[TRUE/FALSE] The liquid with the lowest BP turns into vapor first

TRUE

What part of the set-up will the vapor be turned to liquid again?

Condenser

Term for the collected liquid after condensation?

Distillate

A type of distillation that utilizes repetition of distillation for several times

Fractional distillation

[TRUE/FALSE] Distillation is limited to certain extent because compounds ______________

A. Decompose

B. Evaporate

C. Bump each other during boiling

A. Decompose

[TRUE/FALSE] Decomposition of some organic compounds may happen when they are distilled at slightly elevated atmospheric pressure.

FALSE. Decomposition of organic compounds during distillation may happen at normal ATM.

[TRUE/FALSE] lowering the pressure promotes decomposition of some organic compounds during distillation

FALSE. Actually, lowering the pressure resolves this problem.

What happens to the boiling point of the substance if the pressure was lowered?

Lowered as well

Distillation rate should be maintained at?

1-2 drops/sec

What should be recorded every increments of 2mL?

Temperature

The _____ 10mL is colleted and labeled

A. 1st

B. 2nd

C. 3rd

D. Last

C. 3rd

All fraction distillate should be recorded EXCEPT;

A. 1st

B. 2nd

C. 3rd

D. NOTA

B. 2nd

This distillate contains a mixture of the two solvents

second distillate

[TRUE/FALSE] The second fraction of distillate is impure

TRUE

[TRUE/FALSE] The gathered BP recordered whould be compared to the theoretical BP of the liquid

TRUE

Theoretical BP of diethyl ether is:

A. 77

B. 35

B. 35

Theoretical Boiling point of Ethanol

A. 78

B. 117

A. 78

40 deg C is the theoretical boiling point of?

ddichloromethane

77 deg C is the boiling point of?

ethyl acetate

At what temperature will acetone boil?

56 deg C

[TRUE/FALSE] Butanol will boil at 117.5 deg C

FALSE. It will boil at 117 deg C.