Yuav ua li cas npaj Cov Dej Cawv Dej

Txoj kev npaj cov cawv tsis nyuaj, cov kauj ruam yog raws li nram no:

Noj 100g ntawm 95% muaj cawv, ntxiv 13g ntawm stearic acid, kub thiab do nyob rau hauv ib lub hwj, tuav qhov kub ntawm 60 degrees, kom txog thaum lub stearic acid yog kiag li yaj.

Nws yuav siv li 40 feeb. Ntxiv 84g cawv thiab 2g ntawm NaOH rau lwm lub hwj, thiab kub thiab do ntawm tib qhov kub kom txog thaum NaOH yaj tag.

Tom qab ntawd, sib tov ob txoj kev daws teeb meem sib npaug thaum kub, ncuav rau hauv pwm, thiab tos kom lawv txias kom tau ib qho kev sib xws, yuav luag pob tshab Cov Dej Cawv Roj.

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