dej ntshiab muaj pH ntawm 7 thiab suav tias "tsis suav" vim nws tsis muaj cov kua qaub lossis cov txiaj ntsig zoo.
PH zoo rau dej yog dab tsi?
Yog dej qis dua 7 ntawm pH nplai, nws yog "acidic." Yog tias nws siab tshaj 7, nws yog "alkaline." EPA cov lus qhia hais tias pH ntawm cov kais dej yuav tsum yog ntawm 6.5 thiab 8.5.
pH tus nqi ntawm 100% dej yog dab tsi?
dej ntshiab yog nruab nrab. Nws tsis yog acidic lossis yooj yim, thiab muaj pH ntawm 7.0.
Puas yog dej ntshiab muaj pH siab?
Nws yuav tsum pom tseeb tias cov no yog cov khoom ntawm cov dej molecule, lossis H2O. Thaum dej muaj hydrogen ions ntau dua li nws ua hydroxide ions, nws yog acidic (pH tsawg dua 7). … Nyob rau hauv dej ntshiab heev, tus naj npawb ntawm H + thiab OH- yuav ib txwm sib npaug, thiab pH yuav nruab nrab ntawm 7.
Vim li cas pH ntawm cov dej ntshiab 7?
pH yog ib qho kev ntsuas ntawm tus nqi ntawm Hydrogen ions (H +) hauv kev daws. … Txawm tias nyob rau hauv cov dej ntshiab ions zoo li tsim los ntawm random txheej txheem (tsim ib co H + thiab OH- ions). Tus nqi ntawm H + uas tau ua hauv cov dej ntshiab yog sib npaug ntawm pH ntawm 7. Yog vim li cas 7 yog nruab nrab.
