Law of chemical equilibrium

Japanese: 化学平衡の法則 - かがくへいこうのほうそく

For the chemical reaction a A + b B + …⇄ p P + q Q + …, the condition of chemical equilibrium dG = 0 indicates that when chemical equilibrium is reached, the concentration ratio is constant under the given conditions. K is called the equilibrium constant, and this relationship is called the law of mass action or the law of chemical equilibrium. The standard free energy change of the reaction ⊿ G ⁰ has the following relationship with the equilibrium constant K : ⊿ G ⁰ = - RT ln K. …

From the law of mass action:

…This is a general relationship that holds between the amounts of substances involved in a reaction in chemical equilibrium, also known as the law of chemical equilibrium. When the following reaction a A + b B + … ⇄ m M + n N + … in which substances A (a mol ), B ( b mol), … react to produce M ( m mol), N (n mol), …, reaches chemical equilibrium, the following relationship holds between the concentrations C _i of each substance i ( i = A, B, …): …

*Some of the terminology that refers to the "law of chemical equilibrium" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…化学反応，　aA＋bB＋……⇄pP＋qQ＋……に対して，化学平衡の条件dG＝0から，化学平衡に達したとき濃度比，は与えられた条件のもとで一定となることが示される。Kを平衡定数と呼び，この関係を質量作用の法則あるいは化学平衡の法則という。反応の標準自由エネルギー変化⊿G⁰は平衡定数Kと次の関係，　⊿G⁰＝－RTlnKがある。…

【質量作用の法則】より

…化学平衡において反応に関与する物質の量の間に成り立つ一般的な関係で，化学平衡の法則とも呼ばれている。物質A(amol)，B(bmol)，……が反応して，M(mmol)，N(nmol)，……を生成する次のような反応　aA＋bB＋……⇄mM＋nN＋……が化学平衡に達したとき，各物質i(i＝A,B，……)の濃度C_iの間に次の関係が成り立つ。…