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1.标准状况下,往100 mL 0.2mol·L~(-1)的FeBr_2溶液中通入一定体积的Cl_2,充分反应后,溶液中有50%的Br~-被氧化.则通入的氯气的体积是().
1. Under the standard conditions, a certain volume of Cl_2 is introduced into 100 mL of 0.2 mol·L -1 FeBr 2 solution, and after sufficient reaction, 50% of the Br - in the solution is oxidized. The volume is ().