I-Calculator ye-pH
Guqula phakathi kwe [H⁺], i-pH, i-pOH kunye ne [OH⁻] kwaye udwelise uxinzelelo lwe-asidi.
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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.
Imibuzo ebuza rhoqo
Yintoni ifomula ye-pH?
I-pH yisiseko esibi se-10 se-logarithm yoxinzelelo lwe-hydrogen-ion, i-pH = -log10[H⁺]. Uxinzelelo lwe-1×10⁻⁷ mol/L lunika i-pH engatshintshiyo ye-7.
I-pH ne-pOH ziqhagamshelana njani?
Kwiqondo lobushushu le-25 °C, i-pH + i-pOH = 14. Ngoko ke, umxube we-pH 3 une-pOH 11, kwaye uxinzelelo lwe-hydroxide luyi [OH⁻] = 10⁻¹¹ mol/L.
Ithetha ntoni ixabiso le-pH?
Ingaphantsi kwe 7 i acidic, ngokuchanekileyo 7 i neutral, kwaye ngaphezulu kwe 7 i basic (alkaline). Isikali sihamba 0- 14, nangona i acids ezinamandla kakhulu okanye iziseko zingawela ngaphantsi ngaphandle kwayo. I kalkuleta iquka ixabiso lakho njenge acidic, neutral okanye basic.
Kutheni i-pH isebenza ngokulinganisa?
Hydrogen-ion concentrations span many orders of magnitude, so a log scale keeps the numbers manageable. Each unit is a tenfold change: pH 4 is ten times more acidic than pH 5 and a hundred times more than pH 6.
Ndiyifumana njani i-[H⁺] kwixabiso le-pH?
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.
Ingaba i-pH itshintsha ngobushushu?
Ewe. Inqanaba elingenakungqubana le-7 ne-pH + pOH = 14 imithetho igcina kwi-25 °C; kwiqondo lobushushu eliphezulu amanzi adibanisa i-ion, ngoko ke i-pH engenakungqubana iwela ngaphantsi kwe-7 kwaye umlinganiselo uwela kancinci. Le sixhobo sisebenzisa amaxabiso aqhelekileyo e-25 °C.
API — sebenzisa le calculator ukusuka kwikhowudi
Nceda le khadi lemali njengendawo esemva ye-JSON ekhululekileyo - akukho qhosha lifunekayo. Thumela amaxabiso endawo ezantsi njengeparameter yombuzo okanye i-JSON. Nantoni na oyenzayo isebenzisa okungagqibekanga okufanayo eli phepha ligqityiwe ngaphambili; iparameter engaziwayo yi 400, ayikho i zero ekhululekileyo. Funda i-API epheleleyo →
Incopho yesiphelo
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);Results are estimates for general guidance only, not financial, medical or tax advice.