kalkulator pH
Pretvorite med [H+], pH, poH in [OH−] in razvrstite kislino.
Rezultati posodabljajo, ko tipkate.
O tem kalkulatorju
The pH scale measures how acidic or basic a solution is, defined as the negative base-10 logarithm of the hydrogen-ion concentration: pH = −log₁₀[H⁺], where [H⁺] is in moles per litre. Because it is logarithmic, each whole pH unit is a tenfold change in acidity — a pH 4 solution has ten times the [H⁺] of pH 5 and a hundred times that of pH 6. The scale runs from strongly acidic near 0, through neutral at 7, to strongly basic near 14. This calculator converts a concentration to pH, a pH back to concentration, or starts from pOH.
As a worked example, pure water has [H⁺] = 1 × 10⁻⁷ mol/L, so pH = −log₁₀(10⁻⁷) = 7, which is neutral. A solution with [H⁺] = 10⁻³ mol/L has pH 3 and is acidic; one with pH 11 is strongly basic. The tool also returns pOH and the hydroxide concentration [OH⁻], using the water relationship pH + pOH = 14 at 25 °C — so pH 3 implies pOH 11 and [OH⁻] = 10⁻¹¹ mol/L — and labels the result acidic, neutral or basic.
pH governs a huge range of everyday and industrial processes: the safety of drinking water and swimming pools, soil conditions for gardening, food preservation and brewing, the action of enzymes in the body (blood is tightly held near pH 7.4), and countless chemistry and biology experiments. Note that the 14-point span and the pH + pOH = 14 rule are specific to 25 °C; at other temperatures the neutral point and the sum shift slightly because water’s self-ionisation changes.
Pogosta vprašanja
Kakšna je formula pH?
pH je negativna osnova 10 logaritma koncentracije vodika-iona, pH = −log10[H+]. Koncentracija 1×10−7 mol/l daje nevtralen pH 7.
Kako so pH in poH povezani?
Pri 25 °C je pH + poH = 14, zato ima raztopina pH 3 poH 11, koncentracija hidroksida [OH−] = 10−11 mol/L.
Kaj pomeni pH skala?
Spodaj 7 je kislo, natančno 7 je nevtralen, in nad 7 je osnovni (alkalne). Lestvica običajno poteka 0–14, čeprav zelo močne kisline ali baze lahko rahlo padejo zunaj njega. Računalo razvrsti vašo vrednost kot kislo, nevtralno ali osnovni.
Zakaj je pH logaritmično?
Koncentracije vodikovega iona so veliko vrst, zato log lestvica ohranja število, ki se upravlja. Vsaka enota je desetkratna sprememba: pH 4 je desetkrat več kislega kot pH 5 in stokrat več kot pH 6.
Kako naj najdem [H+] iz pH vrednosti?
Invert the definition: [H⁺] = 10^(−pH). A pH of 3 gives [H⁺] = 10⁻³ = 0.001 mol/L. Choose "from a pH value" mode and the calculator returns the concentration for you.
Ali se pH spreminja s temperaturo?
Da. Nevtralna točka 7 in pravilo pH + poH = 14 drži pri 25 °C; pri višjih temperaturah voda ionizira več, tako nevtralni pH pade pod 7 in vsota rahlo pada. To orodje uporablja standardne vrednosti 25 °C.
API – uporabi ta kalkulator iz kode
Poišči ta kalkulator kot brezplačni končni cilj JSON – ni potreben ključ. Pošljite spodnje vrednosti polja kot parametre za poizvedovanje ali JSON. Vse, kar opustite, uporablja enako privzeto. Ta stran je napolnjena z; neznani parameter je 400, nikoli ne tiho ničlo. Preberite celoten API docs →
Končna točka
GET https://calculator.free/api/v1/ph/curl
curl "https://calculator.free/api/v1/ph/?mode=conc&conc=1e-07&phval=7"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/ph/?" + new URLSearchParams({
"mode": "conc",
"conc": "0.0000001",
"phval": "7"
}));
const data = await r.json();
console.log(data.results);Rezultati so ocene za splošne smernice, ne pa za finančne, zdravniške ali davčne nasvete.