what is the necessity of milimol(conc. unit) when you can convert the given volume in ml to litres and express

Question

the conc. in molarity?

also, why should the miliequivalents of two reacting substances be always equal? isn't it possible for 1 miliequivalent of a substance to react with 2 miliquivalents of another substance?

thanks:)

Answer 1

The first question depends on the problem. If you have small concentrations, millimoles are more suitable and easier to handle with.

For the second in a solution you MUST have EQUALITY between POSITIVE and NEGATIVE charges. Else what would happen with the positive OR negative free charges? There are no exception to that rule