Cov Txheej Txheem Txheeb Xyuas Calcium formate
Formate ion: Hnyav 0.5g ntawm Calcium formate qauv, yaj nws rau hauv 50ml dej, ntxiv 5ml ntawm sulfuric acid kua, thiab cua sov; ib qho tsw ntawm formic acid yuav tsum tau tso tawm.2.2 Calcium ion: Hnyav 0.5g ntawm cov qauv, yaj nws rau hauv 50ml dej, ntxiv 5ml ntawm ammonium oxalate kua; ib qho av dawb yuav tsim. Cais cov av: nws tsis yaj rau hauv glacial acetic acid tab sis yaj rau hauv hydrochloric acid.
Vim li cas ho xaiv calcium formate? Nws tsis muaj hmoov av ntau, ua haujlwm sai, thiab ua haujlwm zoo kawg nkaus rau txhua yam los ntawm kev pub tsiaj mus rau cov ntaub ntawv siv hauv kev tsim kho - tsis muaj kev cuam tshuam rau qhov zoo!
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-10-2025