[H+]*[OH-]=10^(-14) at Room Temperature
neutral means [H+]=[OH-]
so [H+]=10^(-7)
pH=lg[H+]
so
pH=7 at Room Temp


so, actually, when temperature change, neutral pH may vary


【 在 superlin1118 (super) 的大作中提到: 】
: 为啥不是8或者是9啊？
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