Select the key term that corresponds to the following definitions: the constant that expresses the molar equiLiBrium concentrations of ions in an aqueous solution for a slightly dissociated ionic compound 1) activation energy (E_act) 2) catalyst 3) chemical equiLiBrium 4) collision theory 5) endothermic reaction 6) exothermic reaction 7) general equiLiBrium constant (K_eq) 8) heat of reaction (ΔH) 9) heterogeneous equiLiBrium 10) homogeneous equiLiBrium 11) ionization equiLiBrium constant (K_i) 12) law of chemical equiLiBrium 13) Le Chatelier's principle 14) rate of reaction 15) reaction profile 16) reversible reaction 17) solubility product equiLiBrium constant (K_sp) 18) transition state