Class AcidBase

java.lang.Object

org.episteme.natural.chemistry.acidbase.AcidBase

public class AcidBase
extends Object

pH calculations for aqueous solutions.

Provides tools for:

• pH and pOH calculations
• H+ and OH- concentration conversions
• Buffer capacity analysis
• Henderson-Hasselbalch equation

Since:

1.0

Author:

Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

Field Summary

Fields

Modifier and Type	Field	Description
static final Real	KW_25C	Water ionization constant at 25°C
static final Real	STANDARD_TEMP_K	Standard temperature for Kw (25°C)

Method Summary

Modifier and Type	Method	Description
static Real	bufferCapacity(Real totalBufferConc, Real Ka, Real pH)	Buffer capacity (Van Slyke equation approximation).
static String	classify(Real pH)	Classifies solution by pH.
static Real	hConcentration(Real pH)	Calculates [H+] from pH.
static Real	hendersonHasselbalch(Real pKa, Real conjugateBaseConc, Real acidConc)	Henderson-Hasselbalch equation for buffer pH. pH = pKa + log([A-]/[HA])
static Real	kwAtTemperature(Real temperatureK)	Temperature-corrected Kw.
static Real	ohConcentration(Real pOH)	Calculates [OH-] from pOH.
static Real	pH(Real hConcentration)	Calculates pH from hydrogen ion concentration.
static Real	pHtopOH(Real pH)	Converts pH to pOH at 25°C.
static Real	pOH(Real ohConcentration)	Calculates pOH from hydroxide ion concentration.
static Real	weakAcidpH(Real Ka, Real acidConcentration)	Calculates pH of a weak acid solution.
static Real	weakBasepH(Real Kb, Real baseConcentration)	Calculates pH of a weak base solution.

Methods inherited from class Object

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

Field Details

STANDARD_TEMP_K

public static final Real STANDARD_TEMP_K

Standard temperature for Kw (25°C)

KW_25C

public static final Real KW_25C

Water ionization constant at 25°C

Method Details

pH

public static Real pH(Real hConcentration)

Calculates pH from hydrogen ion concentration.

pOH

public static Real pOH(Real ohConcentration)

Calculates pOH from hydroxide ion concentration.

hConcentration

public static Real hConcentration(Real pH)

Calculates [H+] from pH.

ohConcentration

public static Real ohConcentration(Real pOH)

Calculates [OH-] from pOH.

pHtopOH

public static Real pHtopOH(Real pH)

Converts pH to pOH at 25°C. (pH + pOH = 14 at 25°C)

hendersonHasselbalch

public static Real hendersonHasselbalch(Real pKa,
 Real conjugateBaseConc,
 Real acidConc)

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

weakAcidpH

public static Real weakAcidpH(Real Ka,
 Real acidConcentration)

Calculates pH of a weak acid solution. Uses simplified Ka expression: Ka = x²/(Ca - x)

weakBasepH

public static Real weakBasepH(Real Kb,
 Real baseConcentration)

Calculates pH of a weak base solution.

bufferCapacity

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

Buffer capacity (Van Slyke equation approximation). β = 2.303 * C * Ka * [H+] / (Ka + [H+])²

kwAtTemperature

public static Real kwAtTemperature(Real temperatureK)

Temperature-corrected Kw.

classify

public static String classify(Real pH)

Classifies solution by pH.