Kev ceev faj cia Khaws cia rau hauv qhov chaw txias, cua txias. Khaws kom deb ntawm qhov hluav taws kub thiab cua sov. Lub pob yog kaw. Nws yuav tsum tau muab cais tawm ntawm cov oxidants, txo cov neeg ua haujlwm, acids, alkalis, thiab cov tshuaj noj tau, thiab tsis txhob sib xyaw cia. Nruab nrog qhov tsim nyog ntau yam thiab ntau ntawm cov khoom siv hluav taws xob. Qhov chaw cia khoom yuav tsum tau nruab nrog cov ntaub ntawv tsim nyog kom muaj qhov to.
