• 2021-04-14
    【单选题】以K2CrO4作指示剂时,指示剂浓度过大或过小对测定有何影响
    A. K2CrO4的浓度太高,终点推迟,结果偏高; K2CrO4的浓度太低,终点提前,结果偏低; B. K2CrO4的浓度太高,终点推迟,结果偏低; K2CrO4的浓度太低,终点提前,结果偏高; C. K2CrO4的浓度太高,终点提前,结果偏低; K2CrO4的浓度太低,终点推迟,结果偏高; D. K2CrO4的浓度太高,终点提前,结果偏高; K2CrO4的浓度太低,终点推迟,结果偏低;