在稀的砷酸溶液中,通入 H 2 S 以制备硫化砷溶胶 (As 2 S 3 ) ,该溶胶的稳定剂是 H 2 S ,则其胶团结构式是: ( )
A.
[(As 2 S 3 ) m ·nH + ,(n-2x)HS - ] x- ·xH S-
B.
[(As 2 S 3 ) m ·nHS - ,(n*x)H + ] x- ·xH +
C.
[(As 2 S 3 )m·nH + ,(n+x)HS - ] x- · xH S-
D.
[(As 2 S 3 )m·nHS - ,(n-x)H + ] x- ·xH +