Qhov sib txawv tseem ceeb ntawm pH thiab titratable acidity yog qhov pH ntsuas qhov concentration ntawm cov dawb protons hauv cov tshuaj uas yog titratable acidity ntsuas cov sum ntawm dawb protons thiab un-dissociated acids nyob rau hauv ib tug tov.
Lub acidity ntawm cov tshuaj ntsuas lub peev xwm ntawm cov tshuaj ntawd los ua kom lub hauv paus. Qhov no yog vim cov kua qaub muaj cov proton dissociable (H + ions) thiab cov hauv paus tuaj yeem tso tawm OH- ions. Thaum cov kua qaub reacts nrog lub hauv paus, H + ions thiab OH- ions react nrog ib leeg los tsim cov dej molecules (H2O). Li no, nws yog ib qho tshuaj tiv thaiv neutralization.
pH yog dab tsi?
Tus pH yog qhov ntsuas ntawm qhov concentration ntawm cov dawb protons (H + ions) hauv cov tshuaj. Cov protons no yog H + ions uas cuam tshuam los ntawm cov kua qaub. Yog li, los ntawm kev ntsuas pH ntawm cov tshuaj, peb tuaj yeem ntsuas lub zog acid ntawm cov tshuaj. Nws txhais tau hais tias peb tuaj yeem ntsuas lub peev xwm ntawm qhov kev daws teeb meem no kom tsis txhob muaj lub hauv paus. Yog hais tias cov tshuaj yog acidic, tus nqi pH tsawg dua 7. Tab sis yog hais tias cov tshuaj yog alkaline, pH ntawm cov tshuaj yog siab tshaj 7.
Daim duab 01: pH Scale
Peb xav txog pH 7 raws li tus nqi nruab nrab pH. Peb tuaj yeem ntsuas pH ntawm kev daws nrog pH meter. Qhov sib npaug rau kev suav pH siv cov dawb proton concentration yog raws li hauv qab no;
pH=-log [H+]
Titratable Acidity yog dab tsi?
Titratable acidity (TA) yog ib qho kev ntsuas ntawm tag nrho cov acidity raws li tus nqi kwv yees. Nws txhais tau hais tias lub titratable acidity muab cov sum ntawm dawb protons thiab un-dissociated acids nyob rau hauv ib tug daws. Tab sis, nws yog qhov kwv yees ntawm tag nrho cov acidity vim tias nws tsis tuaj yeem ntsuas tag nrho cov acidic hom hauv cov tshuaj (tag nrho cov acidity yog qhov ntsuas qhov tseeb dua).
Chav ntsuas ntawm qhov ntsuas no yog grams ib litre (g / L). Tsis tas li ntawd, qhov acidity no muab tag nrho cov concentration ntawm protons nyob rau hauv ib qho kev daws teeb meem uas tuaj yeem hnov mob nrog lub hauv paus muaj zog los ua kom lub hauv paus tsis zoo. Piv txwv li: NaOH yog lub hauv paus muaj zog uas feem ntau siv rau hauv kev ntsuas ntawm TA.
Qhov txawv ntawm pH thiab Titratable Acidity yog dab tsi?
pH yog ib qho kev ntsuas ntawm qhov concentration ntawm cov dawb protons (H + ions) nyob rau hauv ib qho kev daws thiab qhov parameter no yog chav tsev-tsawg. Whereas, titratable acidity (TA) yog ib qho kev ntsuas ntawm tag nrho cov acidity raws li tus nqi kwv yees. Chav ntsuas ntawm qhov ntsuas no yog grams ib liter (g / L). Qhov no yog qhov txawv ntawm pH thiab titratable acidity.
Summary – pH vs Titratable Acidity
pH thiab titratable acidity yog qhov tseem ceeb heev hauv kev txiav txim siab cov av zoo siv cov av tov. Qhov txawv ntawm pH thiab titratable acidity yog qhov pH ntsuas qhov concentration ntawm cov dawb protons nyob rau hauv ib qho kev daws whereas lub titratable acidity yog ib qho kev ntsuas ntawm cov sum ntawm dawb protons thiab un-dissociated acids nyob rau hauv ib tug tov.
