13. What is the function of NaOH solution?
A. To supply OH- ions which hydrolyse ester to give soap.
B. To supply Na+ ions which hydrolyse ester to give soap.
C. To supply H2O for hydrolysis.
D. To make the acid stable in the acidic medium.
唔該+ 埋解釋ar~
Detergent
2007-02-21 7:31 pm
回答 (1)
2007-02-21 9:05 pm
✔ 最佳答案
answer is Aester undergoes alkaline hydrolysis to give alcohol and salt. If the ester u mention is an oil (i.e. a triester), glycerol (propan-1,2,3-triol) and soap will be formed.
B is not correct because what we need is an alkaline medium but not Na+ ions. KOH can achieve similar results.
C is not correct. ester do not easily hydrolyse in H2O
D is not correct. Alkalis neutralize the acid rather than "stablizing" it.
2007-02-22 19:52:55 補充：
i'm gordonlai88. Actually what i mean is that hydrolysis needs alkaline medium but not Na+ ions. E.g. u can use KOH to do this, but u cannot use Na2SO4 to do the hydrolysis !!!
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