pKa
Proton donation strength
pKa is a measure of acid strength in chemistry—specifically, the negative logarithm of an acid's dissociation constant.
Lower pKa values indicate stronger acids that more readily donate protons.
The scale helps predict how substances behave in solution: Acetic acid has a pKa of about 4.76, making it a weak acid.
Chemists use pKa to understand drug absorption, buffer systems, and reaction mechanisms.
Positive nuclear particle
- hydrogen ionLone proton, no electron
- equilibriumState of balance
- titrationMeasuring concentration by addition
- bufferProtective intermediate space
ionization · phenol · logarithm · basic · neutral · hydroxyl
Fraction reaching active circulation
- blood-brain barrierProtective cerebral filtration system
- ionizedConverted to charged particles
- unionizedFormed a labor collective
- aspirinAcetylsalicylic acid tablet
ibuprofen · morphine · barbiturate · solubility · formulation · excretion
Sign revealing status
- endpointFinal point reached
- pH meterInstrument measuring acidity levels
- electrodeConductive interface point
- calibrationAdjusting for measurement accuracy
aqueous solution · activity coefficient · thermodynamic · tautomer
Amino acid, essential early
- cysteineThiol-containing amino acid
- aspartateAcidic amino acid
- glutamateExcitatory neural transmitter
- lysineEssential amino acid
protein folding · catalysis · side chain · nucleophile · electrophile · peptide · hemoglobin · metabolite
proton
Positive nuclear particle
- hydrogen ionLone proton, no electron
- equilibriumState of balance
- titrationMeasuring concentration by addition
buffer · ionization · phenol · logarithm · basic · neutral · hydroxyl
bioavailability
Fraction reaching active circulation
- blood-brain barrierProtective cerebral filtration system
- ionizedConverted to charged particles
- unionizedFormed a labor collective
aspirin · ibuprofen · morphine · barbiturate · solubility · formulation · excretion
indicator
Sign revealing status
- endpointFinal point reached
- pH meterInstrument measuring acidity levels
- electrodeConductive interface point
calibration · aqueous solution · activity coefficient · thermodynamic · tautomer
histidine
Amino acid, essential early
lysine · protein folding · catalysis · side chain · nucleophile · electrophile · peptide · hemoglobin · metabolite · cofactor
- Chemistry Calculationsstoichiometry, moles, balancing equations, balanced equation, chemical equation
- Molecular Propertiesmolecular weight, molecular formula, solubility, polarity, hydrophobicity
- pH ChemistrypH, base, bases, basic, alkaline
- Science AbbreviationsDNA, RNA, ATP, ADP, AMP
- buffersvideo buffer, CAPS, PBS, TBS, buffer overflow
- ionsion, ions, anion, cation, anions