题目内容

A型题古蔡法检查砷时，加入碘化钾和氯化亚锡的主要作用是

A. 增加AsH₃的生成
B. 将As⁵⁺还原成As³⁺
C. 加快氢气的产生
D. 抑制SbH₃的生成
E. 将生成的碘还原成碘离子

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