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Which one of the following salts is obtained by the reation of a weak acid with a strong base.

MgCl2
NH4F
LiClO4
NaCl
K2SO3

1 answer

You must go through each one as in the first.
MgCl2 must come from Mg(OH)2 and HCl
NH4F must come from NH3 and HF
How do you know the acid and base are strong or weak. Look in the table of ionization constants. Listed are the weak ones. Not listed means they are strong.