【单选题】在选择氧化还原指示剂时,指示剂变色的 ( ) 应落在滴定的突跃范围内,至少也要与突跃范围有足够的重合。
【单选题】以指示剂颜色突变确定氧化还原滴定终点时,选择指示剂的方法是:
【判断题】选择氧化还原指示剂时,应使指示剂的条件电位尽量与化学计量点一致,或在滴定突跃范围内变色。
【简答题】A.are involved B.involved C.involve D.have involved
【判断题】在选择氧化还原指示剂时,指示剂变色的电位范围应落在滴定的突跃范围内,至少也要部分重合。
【单选题】茚三酮试剂与下列药物成分显蓝紫色的是()。
【单选题】( )6.So involved with their computers________that leaders at summer computer camps often have to force them to break for sports and games.
C.
had the children become
D.
do the children become