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把一小块金属钠投入盛有足量煤油和水的试管中,观察实验现象,得到与试题参考答案不相吻合的结论,说明原有理论难以解释该现象,于是提出了把一小块金属钠投入盛有足量煤油和水的试管中的现象是:“钠在煤油中逐渐下沉,至水面时熔成银白色小球,并有大量气泡冒出。前2 min钠会在水和煤油的交界面快速上下浮动,随着反应的进行,金属钠在水和煤油的交界面上下浮动的速率越来越慢,最后金属钠悬浮在煤油表层下面,不再与水接触而使反应不能继续发生。”实验与理论相结合,实验在检验理论的同时,又促使人们提出更新的理论。
Put a small piece of sodium into a test tube filled with kerosene and water. Observe the experimental phenomena and get the conclusion that the original theory is hard to explain. So a small piece of metal The phenomenon of sodium being put into a test tube containing enough kerosene and water is: “Sodium gradually sinks in kerosene and melts into silver-white pellets when it reaches the surface and a large amount of bubbles emerge. And kerosene interface quickly up and down the float, as the reaction progresses, metal sodium in water and kerosene at the interface up and down the rate of slower and slower, and finally suspended in sodium metal kerosene below the surface, no longer contact with water and the reaction Can not continue to happen. ”" Experiments and theories are combined. Experiments, while examining theories, prompt people to come up with newer theories.