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在没有电场力的作用下,如何能明显的比较离子(例如水合氢离子H_3O~+和水合铁离子等)移动速度的差异,并从投影屏幕上显示出来?我们的办法是: 1.离子扩散“跑道”的制作 在500mL烧杯中加入约150mL沸水,一边搅动一边加入约0.5g琼脂,待琼脂完全溶解后,冷却到50℃左右,加入约3mL10％的亚铁氰化K_4[Fe(CN)_6]溶液和1～2滴酚酞指示剂,搅动均匀。由于亚铁氰化钾在溶液中
How can we significantly compare the movement speeds of ions (such as hydronium ions H_3O+ and hydrated iron ions) under the action of no electric field force and show them on the projection screen? Our approach is: 1. Ion diffusion The production of the “runway” was performed by adding about 150 mL of boiling water to a 500 mL beaker and adding about 0.5 g of agar while stirring. After the agar was completely dissolved, it was cooled to about 50°C and about 3 mL of 10% ferrocyanide K_4 [Fe(CN) was added. _6] Solution and 1 to 2 drops of phenolphthalein indicator, stir evenly. As potassium ferrocyanide is in solution