Modelová Otázka ID 3660 - 
Rozpustíme‑li 1 mol bromidu draselného v 5 litrech vody, dostaneme roztok:
Správná odpověď je: D
KBr je iontová sloučenina – ve vodě dochází k rozpadu na ionty. Látkové množství udává celkový počet částic, které jsme do roztoku přidali, nezávisí na výsledném objemu. 1 mol bromidu draselného obsahuje 1 mol Br− a 1 mol K+.
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