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在人民教育出版社出版的“高中物理學”第三册84頁上叙述了一個實驗,用來說明離子在電場作用下的移動軌跡。它的作法如下:如圖,在一張長方形濾紙上塗以硫酸鈉溶液和酚酞溶液,並把紙放到玻璃板上,然後在紙上放一條被苛性鈉溶液浸過的白線。如果在這條線的兩邊和線距離相等的地方,在紙上放兩個電極並 通以電流,苛性鈉的氫氧根離子(OH~-)向陽極移動,在它通過的路程上便出現了深紅的顏色。我們仿做這個實驗時,曾經失敗過;但經過了研究和改進,多次實驗的結果,證明上面
An experiment is described on page 84 of “High School Physics”, People’s Education Press, to illustrate the trajectories of ions under electric fields. It works as follows: As shown, apply a solution of sodium sulfate and phenolphthalein on a rectangular filter paper and place the paper on a glass plate, then place a white thread on the paper soaked in caustic soda solution. If two electrodes are placed on the paper and energized at both sides of the line and at the same distance from the line, the caustic soda hydroxide hydroxide (OH ~ -) moves towards the anode, and as it passes through, it appears Crimson color. When we imitated this experiment, we had failed; but after research and improvement, the results of many experiments proved that