Question

What Rasthe plL of the soap solution? Using structures write a chemical reaction of the soap and water that explains this observation. 2pts 2.W (R The other prodoct of the saponification reaction is glycerol. What happens to the glycerol produced in the reaction? 2pts olento Frn ucerol wilth vscal to pic pat a Soa p, identical. How could you use melting point analysis to determine which compound is isolated? 2pts we hen n尺lti") pointob fa。GULSpongd ave Identical fun 1 ra te e identiti a{ substan@ ISolated hedo miked neHar pulit 2) depe °.jpne obser le nペIt(ng d in-l a S. The Melting points of the triglyceride and carboxylhie acid are both 50-60 0 while thie oa fattiaid rata ads are lor safuva turdt ar

Answer 1

Question 2

Soap is sodium or potassium salts of fatty acids such as palmitic acid, stearic acid, oleic acid etc. To account the P^H of soap solution, it should be dealt with the concept of hydrolysis of salt. Soap can be considered as salt of a weak acid with a strong base and can be generally represented as RCOO^- Na⁺where R is a long chain hydrocarbon.

RCOO^- Na⁺upon hydrolysis gives carboxylic acid (the fatty acid) RCOOH and NaOH as the products. Carboxylic acid being the weak acid it dissociate only partially whereas the NaOH dissociate completely. Hence the solution experiences a domination of hydroxide ion. Hence the P^H value will be in the alkaline zone that is above 7.