Question

Indicate the materials that are appropriate for extinguishing a fire involved with benzoic acid and naphthalene

Why is frequent venting nescesary when extracting the diethyl ether solution with aqueous base

Answer 1

QUESTION-1:

BENZOIC ACID:

Firefighting media:: 1. Dry chemical, carbon dioxide, water spray or regular foam. 2. For larger fires, use water spray, fog or regular foam. 3. Water is usd in flooding quantities as a fog, solid streams of water may be ineffected.   

NAPHTHALENE::

Firefighting media::    1. Dry chemicals, carbon dioxide, sand, foam, steam or water fog, alcohol-resistant fog.    2. Cool containing vessels by water spray.

QUESTION-2:

Separatory funnel is the tool of trade for liquid-liquid extractions. The separatory funnel is shaken and vented to- 1. increase the surface area between the two layers. 2. speed the attainment of equilibrium.    The organic layer (ether) is then separated from the aqueous layer .

Frequent venting is necessary to avoid pressure build-up, otherwise separatory funnel could explode.