Class pHCalculator

java.lang.Object

org.episteme.natural.chemistry.acidbase.pHCalculator

public class pHCalculator
extends Object

pH and buffer calculations. All methods use Real for type-safe computations.

Since:

1.0

Author:

Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

Method Summary

Modifier and Type	Method	Description
static Real	bufferCapacity(Real totalBufferConcentration, Real Ka, Real pH)	Calculates buffer capacity (approximate).
static Real	bufferPH(Real pKa, Real conjugateBaseMolarity, Real acidMolarity)	Henderson-Hasselbalch equation for buffer pH. pH = pKa + log10([A-]/[HA])
static Real	concentrationFromPH(Real pH)	Calculates hydrogen ion concentration from pH.
static boolean	isAcidic(Real pH)	Checks if a solution is acidic (pH invalid input: '<' 7).
static boolean	isBasic(Real pH)	Checks if a solution is basic/alkaline (pH > 7).
static boolean	isNeutral(Real pH, Real tolerance)	Checks if a solution is neutral (pH ≈7).
static Real	KaFromPKa(Real pKa)	Calculates Ka from pKa.
static Real	pHFromConcentration(Real hydrogenIonMolarity)	Calculates pH from hydrogen ion concentration. pH = -log10[H+]
static Real	pKaFromKa(Real Ka)	Calculates the pKa from Ka.
static Real	pOHFromPH(Real pH)	Calculates pOH from pH. pOH = 14 - pH (at 25°C)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

pHFromConcentration

public static Real pHFromConcentration(Real hydrogenIonMolarity)

Calculates pH from hydrogen ion concentration. pH = -log10[H+]

concentrationFromPH

public static Real concentrationFromPH(Real pH)

Calculates hydrogen ion concentration from pH. [H+] = 10^(-pH)

pOHFromPH

public static Real pOHFromPH(Real pH)

Calculates pOH from pH. pOH = 14 - pH (at 25°C)

bufferPH

public static Real bufferPH(Real pKa,
 Real conjugateBaseMolarity,
 Real acidMolarity)

Henderson-Hasselbalch equation for buffer pH. pH = pKa + log10([A-]/[HA])

bufferCapacity

public static Real bufferCapacity(Real totalBufferConcentration,
 Real Ka,
 Real pH)

Calculates buffer capacity (approximate). β = 2.303 * C * Ka * [H+] / (Ka + [H+])^2

isAcidic

public static boolean isAcidic(Real pH)

Checks if a solution is acidic (pH invalid input: '<' 7).

isBasic

public static boolean isBasic(Real pH)

Checks if a solution is basic/alkaline (pH > 7).

isNeutral

public static boolean isNeutral(Real pH,
 Real tolerance)

Checks if a solution is neutral (pH ≈7).

pKaFromKa

public static Real pKaFromKa(Real Ka)

Calculates the pKa from Ka.

KaFromPKa

public static Real KaFromPKa(Real pKa)

Calculates Ka from pKa.