天气预报 > 其他 > 酸和碱PH值是多少
酸和碱PH值是多少
更新时间: 2020-09-23 00:00:00  

常温下,酸的PH小于7,碱的PH大于7。

PH最小值为0,最大值为14,其值越大表示碱性越强,值越小表示酸性越强。

pH值,亦称氢离子浓度指数、酸碱值,是溶液中氢离子活度的一种标度,也就是通常意义上溶液酸碱程度的衡量标准。这个概念是1909年由丹麦生物化学家Peter提出。P代表德语Potenz,意思是力量或浓度,H代表氢离子(H)。

关键词: ph 多少

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