Search results for “pH”

Basic Buffer Acids, Bases & Salts Dimensionless A buffer made from a weak base and one of its salts, giving a pH above 7. pOH = pKb + log([salt]/[base])

Basic Salt Acids, Bases & Salts Dimensionless A salt whose aqueous solution has a pH above 7, or one that retains a hydroxide group.

Bond Dissociation Enthalpy Thermochemistry & Thermodynamics kJ/mol The enthalpy change when one mole of a specific bond is broken homolytically in the gas phase. A–B(g) → A·(g) + B·(g)

Buffer Capacity Acids, Bases & Salts mol/L The amount of strong acid or base a buffer can absorb before its pH changes appreciably. β = dn / d(pH)

Buffer Range Acids, Bases & Salts Dimensionless The span of pH values over which a buffer works effectively, conventionally one unit either side of its pKa. pH = pKa ± 1

Buffer Solution Acids, Bases & Salts Dimensionless A solution that resists changes in pH when small amounts of acid or base are added.

Basic Solution Acids, Bases & Salts mol/L A solution in which the hydroxide ion concentration exceeds the hydrogen ion concentration. [OH⁻] > [H⁺]

Boiling Point States of Matter & Gas Laws °C The temperature at which the vapour pressure of a liquid equals the external pressure acting on it. p_vap = p_external

Boiling Point Elevation Solutions & Colligative Properties °C The rise in a solvent's boiling point caused by the presence of a non-volatile solute. ΔT_b = i K_b m

Bond Polarity Chemical Bonding & Molecular Structure Dimensionless The degree of unequal electron sharing in a covalent bond, arising from an electronegativity difference between the bonded atoms. Δχ = |χ_A − χ_B|

Bidentate Ligand Inorganic & Coordination Chemistry Dimensionless A ligand that binds to the same metal centre through two donor atoms, forming a ring.

Bimolecular Reaction Chemical Kinetics & Catalysis L/(mol·s) An elementary step in which two species collide and react. A + B → products, rate = k[A][B]

Biodegradable Polymer Biochemistry & Polymer Chemistry Dimensionless A polymer that can be broken down into simple substances by the action of microorganisms.

Blank Analytical Chemistry & Spectroscopy Various A sample containing everything except the analyte, measured to correct for background signal.

Body-Centred Cubic States of Matter & Gas Laws Dimensionless A cubic arrangement with particles at the eight corners plus one at the centre of the cell. 2 atoms per cell, 68% packing

Results for “pH”