relating to the relationship between the quantities of substances involved in a chemical reaction and the substances that are produced as a result of that chemical reaction

It is possible to predict the effect of changing concentration by referring to the stoichiometric equation for the reaction. 可以通过参考反应的化学计量方程式来预测改变浓度的效应。

These salts were added in sufficient quantities to obtain the same stoichiometric balance as sea water.