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碘溶液的配制?

2025-03-30 15:30:50

推荐回答（1个）

回答（1）：

碘标准溶液（0.1mol/l
）配制：称取13g
碘化钾，溶于100ml水中，稀释至1000ml，摇匀，保存于棕色具塞瓶中。标定：称取0.15g预先在硫酸干燥器中干燥至恒重的基准三氧化二砷，称准至0.0001g。置于碘量瓶中，加4ml氢氧化钠溶液（1.0mol/l）溶解，加50ml水，加2滴酚酞指示液（10g/l），用硫酸溶液[c（1/
2H2SO4）=1MOL/L]中和，加3g碳酸氢钠及3ml5g/l淀粉指示液，用配置好的碘溶液[c（1/2I2）＝0.1mol/l]滴定至溶液呈浅蓝色，同时做空白试验。

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