Ua raws li "Zoo tshaj plaws, Kev xa khoom sai, Nqe pheej yig", peb tau tsim kev koom tes ntev nrog cov neeg siv khoom los ntawm txhua lub tebchaws thiab hauv tebchaws thiab tau txais cov lus pom zoo ntawm cov neeg siv khoom tshiab thiab yav dhau los rau Acetic acid zaub mov additives, Peb zoo siab tos txais cov phooj ywg los ntawm txhua qhov chaw ntawm lub neej los nrhiav kev koom tes thiab tsim kom muaj kev zoo nkauj thiab zoo nkauj dua tag kis.
Ua raws li "Zoo zoo, Xa khoom sai, Nqe pheej yig", peb tau tsim kev koom tes ntev nrog cov neeg yuav khoom los ntawm txhua lub teb chaws thiab hauv tsev thiab tau txais cov lus pom zoo ntawm cov neeg siv khoom tshiab thiab yav dhau los, Saib rau pem hauv ntej, peb yuav ua raws li lub sijhawm, txuas ntxiv tsim cov khoom tshiab. Nrog peb pab pawg tshawb fawb muaj zog, cov chaw tsim khoom siab heev, kev tswj hwm kev tshawb fawb thiab cov kev pabcuam zoo tshaj plaws, peb yuav muab cov khoom zoo rau peb cov neeg siv khoom thoob ntiaj teb. Peb caw koj los ua peb cov neeg koom tes ua lag luam rau kev sib pab.














Cov khoom noj khoom haus acetic acid Phenolphthalein indicator solution
Yaj 1 g ntawm phenolphthalein hauv 100 mL ntawm ethanol.
Cov txheej txheem khoom noj khoom haus acetic acid:
Hnyav 2.5 g ntawm cov qauv kom raug txog 0.0001 g rau hauv lub raj mis conical uas muaj 50 mL dej tsis muaj carbon dioxide. Ntxiv 3 tee ntawm cov tshuaj phenolphthalein qhia thiab titrate nrog sodium hydroxide titrant (1 mol/L) kom txog thaum muaj xim liab me ntsis tshwm sim. Txhua 1 mL ntawm sodium hydroxide titrant (1 mol/L) yog sib npaug rau 60.05 mg ntawm C₂H₄O₂.Acetic acid khoom noj khoom haus additives.