Part of Combined Science Structures, trends, chemical reactions, quantitative chemistry and analysis There are only 0.25 moles of HCl (instead of 0.3 moles), so the HCl will run out first. It is the ...

A good way to ensure that one reactant fully reacts is to use an excess of the other reactant. This is financially efficient when one of the reactants is very cheap. When one reactant is in excess, ...