某温度下,将Cl2通入NaOH溶液时,反应得到NaCl、NaClO、NaClO3的混合溶

某温度下,将Cl2通入NaOH溶液时,反应得到NaClNaClONaClO3的混合溶液,经测定混合溶液中,ClOClO3的物质的量浓度之比为31,则Cl2NaOH溶液反应时,被还原的氯元素与被氧化的氯元素质量之比是           

A21     B31         C113       D41

答案

A

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