Substances have chemical reactivity {activity, chemical} {chemical activity}| {chemical potential, reactivity}. Chemical activity expresses true concentration or pressure. Substance concentration relative to other concentrations depends on chemical potential. Solids and pure liquids, including water, have chemical activity one. Metal activities, in decreasing order, are Li, K, Ba, Sr, Ca, Na, Mg, Al, Mn, Zn, Cr, Fe, Cd, Co, Ni, Sn, Pb, H, Cu, Ag, Pd, Hg, Pt, and Au. Non-metal activities, in decreasing order, are F, Cl, Br, and I.
Chemical potential difference {affinity, reaction}| from reactants to products is chemical-reaction driving force.
Substance partial pressure {fugacity}|, relative to other partial pressures, depends on chemical potential.
5-Chemistry-Inorganic-Chemical Reaction
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Date Modified: 2022.0225