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【单选题】
某溶液中含有 0.01 mol·dm -3 AgNO 3 、 0.01 mol·dm -3 Sr(NO 3 ) 2 和 0.01 mol·dm -3 Pb(NO 3 ) 2 、 0.01 mol·dm -3 Ba(NO 3 ) 2 四种盐,向该溶液中逐滴加入 K 2 CrO 4 溶液时,则沉淀的先后顺序是( )。 ( 已知: K sp Ɵ (Ag 2 CrO 4 ) =1.1×10 -12 , K sp Ɵ (PbCrO 4 ) = 1.8×10 -14 , K sp Ɵ (BaCrO 4 ) = 1.2×10 -10 , K sp Ɵ (SrCrO 4 ) = 2.2×10 -5 )A.
Ag 2 CrO 4 ， PbCrO 4 ， SrCrO 4 ， BaCrO 4
B.
PbCrO 4 ， Ag 2 CrO 4 ， SrCrO 4 ， BaCrO 4
C.
SrCrO 4 ， PbCrO 4 ， Ag 2 CrO 4 ， BaCrO 4
D.
PbCrO 4 ， Ag 2 CrO 4 ， BaCrO 4 ， SrCrO 4
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