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QUESTION
Write the correct chemical formula to distinguish between?..... calcium sulfide and calcium hydrogen sulfide
##CaS##, ##"calcium sulfide........."##
##Ca(HS)_2##, ##"calcium hydrogen sulfide........."##
Calcium forms a ##Ca^(2+)## ion, and thus requires 2 negative charges to form a neutral salt. The salts of ##H_2S## could be sulfides, ##S^(2-)##, or hydrogen sulfides, ##HS^(-)##.
