标定盐酸溶液可否采用酚酞作指示剂

2025-03-14 21:23:31
推荐回答(3个)
回答(1):

可以。只不过滴定顺序要变一下就可以了,利用标准NaOH溶液去滴定要标定的盐酸溶液就可以了。因为溶液颜色从无色变为有色现象更明显。最后一滴滴入后,溶液变红且三十秒不褪色就可判定滴定终点。

盐酸的性状为无色透明的液体,有强烈的刺鼻气味,具有较高的腐蚀性。浓盐酸(质量分数约为37%)具有极强的挥发性,因此盛有浓盐酸的容器打开后氯化氢气体会挥发,与空气中的水蒸气结合产生盐酸小液滴,使瓶口上方出现酸雾。

扩展资料:

在氯气和氢气的反应过程中,有毒的氯气被过量的氢气所包围,使氯气得到充分反应,防止了对空气的污染。在生产上,往往采取使另一种原料过量的方法使有害的、价格较昂贵的原料充分反应。

在计算时,若不考虑极稀的溶液,可以假设氢离子的物质的量浓度与原氯化氢浓度相同。如此做即使精确到四位有效数字都不会有误差。

参考资料来源:百度百科--盐酸

回答(2):

可以。只不过滴定顺序要变一下就可以了,利用标准NaOH溶液去滴定要标定的盐酸溶液就可以了。因为溶液颜色从无色变为有色现象更明显。最后一滴滴入后,溶液变红且三十秒不褪色就可判定滴定终点。
之后记录数据,计算就行了。

回答(3):

酚酞不是检测碱性物质的么。

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