In your soap synthesis, you added a solution of sodium chloride and then cooled the reaction...

In your soap synthesis, you added a solution of sodium chloride and then cooled the reaction mixture in order to make the soap precipitate. How does cooling the solution help the soap to precipitate?

I think the answer involves solubility???

Solutions

Expert Solution

Soap is produced by the saponification of a triglyceride. The triglyceride is reacted with a strong base such as sodium to produce glycerol and fatty acid salts (soap).

Triglyceride + base ---> Soap + Glycerol

The soap formed remains in the form of suspension. To recover this soap, sodium chloride is added to the boiling soap solution. The solubility of an ionic compound decreases in the presence of a common ion. The dissolved soap precipitates out due to the common ion effect of Na⁺ The increased concentration of Na⁺ in the solution due to the dissociation of NaCl, shifts the equilibrium towards left and thus soap is precipitated. The recovery of a dissolved salt by adding another salt to the solution is termed salting out.

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

if you added 3.2652 g of calcium chloride to your diluted sodium phosphate solution what reaction...

if you added 3.2652 g of calcium chloride to your diluted sodium phosphate solution what reaction would occur?

The Solvay process involves a reaction of sodium chloride, ammonia and carbon dioxide in aqueous solution....

The Solvay process involves a reaction of sodium chloride, ammonia and carbon dioxide in aqueous solution. Of the various possible products, the one least soluble in water is? Select one alternative: “washing soda” (Na2CO3) "baking soda" (NaHCO3) “sal ammoniac” (NH4Cl) “table salt” (NaCl) ammonium bicarbonate

If you had a stock of 1.5 M sodium chloride solution and you needed to make...

If you had a stock of 1.5 M sodium chloride solution and you needed to make 1 liter of 0.5 M sodium chloride , how would you make it? Show by picture , calcs and a sentence.

How do you would prepare a 2.00 M solution of sodium chloride?

An aqueous solution containing sodium chloride (NaCl) and calcium chloride (CaCl2) is found to have a...

An aqueous solution containing sodium chloride (NaCl) and calcium chloride (CaCl2) is found to have a density of 1.043 g/mL. The results of an analysis indicate that the calcium concentration is 8.3 g/L and the sodium concentration is 12.2 g/L. What is the mole fraction of each component in this solution? Molar mass of Na = 22.99 g/mol Molar mass of Cl = 35.45 g/mol Molar mass of Ca = 40.078 g/mol

Determine the solubility of silver chloride in 0.10 M sodium chloride solution. The Ksp for silver...

Determine the solubility of silver chloride in 0.10 M sodium chloride solution. The Ksp for silver chloride is 1.1 x 10-10.

When an aqueous solution of strontium chloride is added to an aqueous solution of potassium sulfate,...

When an aqueous solution of strontium chloride is added to an aqueous solution of potassium sulfate, a precipitation reaction occurs. Write the balanced net ionic equation of the reaction.

Will a precipitate form when 50.0 mg of sodium chloride is added to 250.0 mL of...

Will a precipitate form when 50.0 mg of sodium chloride is added to 250.0 mL of a 0.100 M solution of silver nitrate? If so, how many grams of precipitate form? Clearly show all your calculations.

Will a precipitate form when 50.0 mg of sodium chloride is added to 250.0 mL of...

Will a precipitate form when 50.0 mg of sodium chloride is added to 250.0 mL of a 0.100 M solution of silver nitrate? If so, how many grams of precipitate form? Clearly show all your calculations.

6) A solution of sodium chloride (molecular weight 58.5) is electrolyzed and it is found that...

6) A solution of sodium chloride (molecular weight 58.5) is electrolyzed and it is found that a current of 1 A liberates 1.3 x 10-3 kg of chlorine (atomic weight 35.5) in one hour. Sodium chloride crystals of density 2.17 x 103 kg/m3 are analyzed by x rays and the unit cell parameter is found to be 5.6 x 10-10 m. From these data calculate the charge on a monovalent ion. 7) In a Milikan oil-drop experiment, a certain droplet...

Subjects