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在两个试管里分别加入溴化钠溶液2毫升,然后向其中一个试管里加氯水1毫升,向另一试管里加碘水1毫升。再在两个试管里各加入无色汽油(或苯)1-2毫升,振荡后静置,观察
Two milliliters of sodium bromide solution was added to two tubes, and then 1 ml of chlorine water was added to one of the tubes, and 1 ml of iodine water was added to the other tube. Add 1-2 ml of colorless gasoline (or benzene) to each of the two test tubes and stand still after shaking.