Tus nqi pH yog ib qho tseem ceeb tshaj plaws ntawm lub cev thiab tshuaj tsis haum ntawm cov tshuaj aqueous. Txhua qhov xwm txheej ntuj uas muaj cov kev daws teeb meem aqueous, tshuaj hloov pauv, thiab cov txheej txheem tsim khoom muaj feem xyuam nrog tus nqi pH. Yog li ntawd, nws yog ib qho tsim nyog los ntsuas pH tus nqi hauv kev lag luam, kev ua liaj ua teb, tshuaj, kev tiv thaiv ib puag ncig, thiab kev tshawb fawb tshawb fawb.
Tus nqi pH ntawm dej yog qhov tsis zoo logarithm ntawm kev ua haujlwm ntawm hydrogen ions hauv dej, qhia tias:
pH=-lg aH plus
Tus nqi pH qee zaum hu ua hydrogen ion index. Vim tias tus nqi ntawm hydrogen ion kev ua haujlwm feem ntau me me, nws tsis yooj yim heev hauv daim ntawv thov, yog li lub tswv yim ntawm pH tus nqi yog siv los ua qhov taw qhia ntawm acidity thiab alkalinity ntawm cov tshuaj aqueous. Ntxiv mus, qhov tsis zoo logarithm ntawm kev ua haujlwm hydrogen ion tuaj yeem qhia qhov loj ntawm qhov loj ntawm qhov kev hloov ntawm acidity thiab alkalinity, yog li nws yooj yim heev rau kev thov, thiab yog li tau txais:
⑴Neutral aqueous solution, pH= -lg aH plus =-lg10-7=7
⑵ Acidic aqueous solution, pH<7, the="" smaller="" the="" ph="" value,="" the="" stronger="" the="">
⑶ Alkaline aqueous solution, pH>7, qhov ntau dua tus nqi pH, qhov muaj zog alkalinity.
Pls Clink Hauv qab Duab thiab Nyeem ntxiv txog qhov PH Meter PH818?
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