Stoichiometry
The equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the

Phase rule
Emperical equations
Theoretical equations
Experimental data

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Stoichiometry
Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because

The salt formed does not hydrolyse
The strong base and strong acid reacts in aqueous solution
The strong base and strong acid reacts completely
Only OH⁻ and H⁺ ions react in every case

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