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【单选题】
FeCl 3 和 H 2 O 能形成 FeCl 3 ·6H 2 O,2FeCl 3 ·7H 2 O,2FeCl 3 ·5H 2 O, FeCl 3 ·2H 2 O 四种水合物,则该体系的独立组分数C和在恒压下最多可能的平衡共存的 F 分别为: ( )
A.
C= 3,F = 4
B.
C= 3,F = 5
C.
C= 2,F = 4
D.
C= 2,F = 3
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