smilejune521
pH是法语“Pouvoir Hydrogène”一词的缩写,亦称氢离子活度指数,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。pH值越趋向于0表示溶液酸性越强,反之,越趋向于14表示溶液碱性越强,在常温下,pH=7的溶液为中性溶液。
dreamjennie
pH=potential of hydrogen) A measure of the acidity or alkalinity of a solution,numerically equal to 7 for neutral solutions,increasing with increasing alkalinity and decreasing with increasing acidity.The pH scale commonly in use ranges from 0 to 14. 酸碱度:溶液酸性或碱性的度量,数值等于7的为中性溶液,数值增大表示碱性增大,数值减小表示酸性的增大.PH值范围一般在0到14之间
勿忘归途
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