PH

Ing pH sukad ne ning panga-asidu (kaslam) o panga-alkaline ning metung a solusiun. Deng solusiun king danum o aqueous solutions king pali o temperaturang 25 °C a maki pH a kulang king pitu (7.0) tuturing da lang asidu, kabang alkaline o basic no man detang maki pH a maigit king pitu. Nung saktu yang 7.0 ing kayang pH, tuturing deng 'neutral' king temperaturang 25 °C uling king temperaturang ita, pante ya ing bilang da reng H3O+ karetang OH− king purung danum. Magdependi ya ing pH king aktibidad da reng hydronium ion (H3O+), dapot kareng maina (o dilute) a solusiun, malyari yang gamitan ing molarity ning H3O+ a e midadayu ketang ustung kuenta  Ing (H+ pane deng gagamitan a katumbas ning H3O+.) Uling magdependi ya ing pH king aktibidad da reng ion, metung a kaurian (property) a e malaguang sukdan o karkulan ibat king teoria (theoretically), masakit yang pakibaluan ing eksaktung sukad ning pH ning metung a solusiun. keraklan, makukua ya ing sukad ning metung a solusiun kapamilata'ning pamiyanti (comparing) kareng solusiun a e ra pa balu pH karetang balu ra na pH, at ating mapilan a paralan bang marapat iti.

Ing minunang migpakilala king konseptu ning pH ya pin ing chemist ibat Denmark a i S. P. L. Sørensen king Carlsberg Laboratory in 1909. Dakal la reng sasabian dang penibatan ning lagyung pH, kayabe no reng pondus hydrogenii, potentia hydrogenii (Latin), potentiel hydrogène (French), ampong potential of hydrogen (English).

Measurement

Deng likidu ning katawan 

Magdependi ing pH da reng miyayaliwang likidu ning katawan ketang gamit da reti at aliwa pang bage. Keraklan, masipit o maigpit ing pamagkontrol kaniti bang panatilian ing w:acid-base homeostasis o pangabalansi da reng asidu ampong alkali  base.

Lon la murin deti 
 Acidosis
 Alkalosis

Pikuanan

Suglung palual 
 Some Ka values
 Definition of pH  IUPAC Gold Book
 The Measurement of pH - Definition, Standards and Procedures – Report of the Working Party on pH, IUPAC Provisional Recommendation (a proposal to revise the current IUPAC 1985 and ISO 31-8 definition of pH described above)
 pH value - Universal indicator software

Acid-base chemistry
Units of measure
Water quality indicators