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0.02%到0.05%溶液怎样简单配置

0.02%到0.05%溶液怎样简单配置

2025-03-28 14:48:07

推荐回答（1个）

回答1：

配置：称取乙二胺四乙酸二钠8克,加1000 mL水,加热溶解,冷却,摇匀. 标定：准确称取0.42克于800℃士50℃的高温炉中灼烧至恒重的工作基准试剂氧化锌,用少量水湿润,加3 ml盐酸溶液(20%)溶解,移入250 mL容量瓶,稀释至刻度,摇匀.取35.00 mL －40.00mL,加。

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