通过学习,我们对碘的单质及其化合物的性质有了一定的了解,但海带中的碘元素到底以何种形式存在,是课本上说的I-还是本来就有的I2,还是碘盐中的IO3-?是钾盐还是钠盐?为此我们通过本实验加以检验,得出结论。一、实验仪器烧杯、试管、坩埚、坩埚钳、铁架台、三脚架、泥三角、玻璃棒、酒精灯、量筒、胶头滴管、刷子、漏斗、滤纸、火柴、剪刀。 Through learning, we have a certain understanding of the simple substance of iodine and the nature of its compounds. However, in what form of iodine in kelp, is I- or I2 in textbooks or is it in iodized salt? IO3-? Is potassium or sodium? To this end we have to test to conclude. First, the experimental equipment Beakers, test tubes, crucibles, crucible clamps, iron stand, tripod, mud triangle, glass rod, alcohol lamp, measuring cylinder, plastic head dropper, brush, funnel, filter paper, matches, scissors.