What salts does calcium form with sulfide dianion, and with hydrogen sulfide anion? Chemistry Ionic Bonds Writing Ionic Formulas 1 Answer anor277 Oct 18, 2016 #CaS#, #"calcium sulfide........."# Explanation: #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^(-)#. Answer link Related questions How do you write ionic formulas for binary compounds? What is the ionic formula for calcium chloride? What is the ionic formula for calcium oxide? What is the ionic formula for lithium oxide? How do you write the formula for ionic compounds? How do I write #Sn(NO_3)_2# in Ionic formula? What is the empirical formula for an ionic compound? What is the molecular formula for chorate? Question #7086b Why are polyatomic ions covalent? See all questions in Writing Ionic Formulas Impact of this question 3100 views around the world You can reuse this answer Creative Commons License