试题与答案

身边一些物质的pH如下,其中显酸性的是[ ] A.酱油的pH约为4~5 B.牙膏

题型:选择题

题目:

身边一些物质的pH如下,其中显酸性的是[ ]

A.酱油的pH约为4~5

B.牙膏的pH约为8~9

C.肥皂的pH约为10

D.厨房清洁剂的pH约为12~13

答案:

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