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硝酸和硫酸哪个酸性强
更新时间： 2021-03-15 07:34:33  

1、酸性：所谓的酸性通常指物质在水溶液中表现出来的性质.酸性强弱是指酸将质子给予水分子的能力。

2、常用酸在水中的电离常数来衡量.硝酸和硫酸的电离方程式如下：HNO3 = H(+) + NO3(-) pKa = -1.34,H2SO4 = H(+) + HSO4(-) pKa = -3,HSO4(-) = H(+) + SO4(2-) pKa = 1.9。显然pKa(HNO3) > pKa(H2SO4),即Ka(HNO3) < Ka(H2SO4),说明硫酸比硝酸的酸性更强。

关键词： 硝酸 硫酸 哪个 酸性

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