[H+][OH-]/[H2O]=為何等於1.8乘10的負16次方,拜託?

2016-10-02 8:44 am

回答 (1)

2016-10-05 7:32 pm
水的電離系數(25攝氏度)是:
[H+] x [OH-] = 1x10^-14

水的摩爾「濃度」[H2O]:
水的密度 = 1000g/l
每一升水重1000g
摩爾數 = 質量/摩爾質量
= 1000g / 18g/mol
= 55.56mol
摩爾濃度 = 摩爾數/體積
= 55.56mol / 1l
[H2O] = 55.56 mol/l

[H+][OH-]/[H2O] = 1x10^-14 / 55.56
= 1.8x10^-16


收錄日期: 2021-04-20 16:43:34
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161002004423AAfb8VC

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