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QUESTION
What is the formula for potassium sulfite?
##K_2SO_3##
Proper nomenclature says that the ion with one less O atom that the "ate" form (i.e. sulfate) is given the suffix "ite". Hence, sulfite ion is ##SO_3^2-##.
We require two potassium ions, each with a +1 charge to form the electrically neutral compound.
