[midterms] biochem lab ( soap )

The alkali metal salts of fatty acids usually having 10-18 carbon atoms

Soap

The starting material for the oldest chemical manufacturing of soap

Fats

The process of dispersing one liquid in another immiscible liquid

Emulsification

Which is not reagent for salting out soap

Glycerol

Which of the following is the positive result of soap solution and magnesium sulfate

Insoluble precipitate

Soap solution with saturated NaCl solution produced ___ after filtration

Curdy mass

Which reagent is being used for the preparation of soap

Sodium hydroxide

Copper sulfate and water, with small amount of detergent gives a __

Bubbles formation

It contains a fat soluble group in their structure salts of sulfonic acid

Syndets

Water containing appreciable amounts of mineral ion causes soap to form insoluble precipitate called

Hard water

(Modified True or False)

The formula of typical synthetic detergent are usually having 12
carbon atoms which also contain water-soluble groups in their structure.

Fat

(Modified True or False)

Saponification is the conversion of soap which denote reaction of an ester with base to give the salt of the alcohol.

Acid

(Modified True or False)

The development Synthetic detergent which also contain fat-soluble group ion on their structure.

True

(Modified True or False)

The cleansing action of soap is attributed to its emulsifying agent.

True

(Modified True or False)

Soap is prepared by reacting fat or oil with sodium chloride.

True

(Modified True or False)

The soluble precipitates are usually dense than soap so that rise to the top of the solution.

Insoluble

(Modified True or False)

In preparation of soap, the fat and aqueous alkali are heat and stirred together and the soap is the precipitated by adding alcohol.

Salt

(Modified True or False)

Red color is the positive results for the properties of soap using an indicator like phenolphthalein.

Purple

(Modified True or False)

Synthetic detergent is the process of converting chemicals in to Soap, involves the neutralization of a fatty acid.

Saponification

(Modified True or False)

Soap can act as wetting agent and emulsifying agent.

True

starting material of soap preparation

Fats

containing Ca and Mg ions

Hard water

alkali contents of soap

Lye solution

yield purple color to soap solution

Phenolphthalein

conversion of soap

Saponification

alkali metal salts of fatty acids

Soaps

potassium hydroxide

Soft soap

insoluble precipitate

Scum

do not precipitate in hard soap

Syndets

one of the function of soap

Wetting agent

(Preparation of Soap or No)

Cardboard

Preparation of Soap

(Preparation of Soap or No)

Distilled water

Preparation of Soap

(Preparation of Soap or No)

Oily globules

Preparation of Soap

(Preparation of Soap or No)

Potassium Hydroxide

Preparation of Soap

(Preparation of Soap or No)

Sud

Preparation of Soap

(Free Alkali in Soap or No)

Cottonseed oil

No

(Free Alkali in Soap or No)

Filter paper

Free Alkali in Soap

(Free Alkali in Soap or No)

Litmus paper

No

(Free Alkali in Soap or No)

Sodium hydroxide

Free Alkali in Soap

(Free Alkali in Soap or No)

Syndets

No

(Salting Out of Soap or No)

Curdy mass

Salting Out of Soap

(Salting Out of Soap or No)

Distilled water

Salting Out of Soap

(Salting Out of Soap or No)

precipitated soap

Salting Out of Soap

(Salting Out of Soap or No)

Sodium chloride

Salting Out of Soap

(Salting Out of Soap or No)

Soap scum

Salting Out of Soap

(Precipitation by Metallic Salts or No)

CaCl

Precipitation by Metallic Salts

(Precipitation by Metallic Salts or No)

CaSO4

Precipitation by Metallic Salts

(Precipitation by Metallic Salts or No)

CuSO4

Precipitation by Metallic Salts

(Precipitation by Metallic Salts or No)

MgSO4

Precipitation by Metallic Salts

(Precipitation by Metallic Salts or No)

Soap solution

No