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The expression of the solubility product constant Ksp for the salt Fe2S3:

А.  Ksp = [Fe3+]3 ⋅[S2–]2

B.  Ksp = [Fe3+]⋅[S2– ]

C.  Ksp = [Fe]2 ⋅[S]3

D.  Ksp = [Fe3+]2 ⋅[S2–]3

E.  Ksp =  2[Fe3+]⋅3[S2–

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D.   Ksp = [Fe3+]2 ⋅[S2–]3 

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