Bases contain OH- ions and accept protons. Bases turn red litmus blue and have pH greater than 7. Bases taste bitter and feel slippery. Bases release OH- ions when dissolved in water
pOH measures hydroxide ion concentration in solutions. Neutral solutions have pOH of 7. Solutions with pOH less than 7 are alkaline. Solutions with pOH greater than 7 are acidic
Hydronium and hydroxide ions are present in all aqueous solutions. Solutions are classified as acidic, basic, or neutral based on ion concentrations. pH and pOH are logarithmic scales expressing hydronium and hydroxide ion concentrations
Equivalent weight is the mass of one substance that combines with another. Element equivalent weight equals atomic weight divided by valence. Acid-base equivalent weight supplies one mole of hydrogen ions. Redox equivalent weight supplies one mole of electrons
pOH measures hydroxide ion concentration in solutions. pOH equals negative logarithm of hydroxide ion concentration. At pOH 7, solution is neutral. Solutions below pOH are alkaline, above pOH are acidic
pKb measures basic strength and estimates molecule's alkalinity. Lower pKb indicates stronger base. pKb equals negative logarithm of base dissociation constant Kb