向含有Fe2+、I-、Br-的溶液中通入适量氯气，溶液中各种离子的物质的量变化如图所示。有关说法不正确的是（ ）
| A．线段BC代表Fe3+物质的量的变化情况 |
| B．原混合溶液中c（FeBr2）="6" mol/L |
| C．当通入Cl2 2 mol时，溶液中已发生的离子反应可表示为：2Fe2++2I-+2Cl2=2Fe3++I2+4Cl- |
| D．原溶液中n（Fe2+）∶n（I-）∶n（Br-）=2∶1∶3 |
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