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求助如何配制钨酸钠溶液

更新时间: 2020-10-14 00:00:00     

配制方法:取2克磷钨酸钠和磷酸氢加入适量的水,用玻璃棒搅拌得到百分之二的磷钨酸钠加入浓盐酸后浓缩结晶而制得。

磷钨酸钠是一种由钨酸钠和磷酸氢二钠共溶于水,加入浓盐酸后浓缩结晶而制得的化学物质钨酸的溶解度相当小,因此钨酸钠不易用于酸性介质,相反钨酸钠在中性和碱性介质中溶解度很大。百分之二的钨酸钠由钨酸钠和磷酸氢二钠共溶于水。

关键词: 求助 如何 配制 溶液

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