9% 醋酸 約 pH 值幾多?
回答 (2)
2007-10-20 1:55 am
✔ 最佳答案
Ka = [H+][CH3COO-] / [CH3COOH]100% 醋酸 = 17.48 M
9% 醋酸(容積百分比) = 1.57 M
Ka(醋酸) = 1.7 * 10^-5 per mol per dm^3
1.7 * 10^-5 = [H+]^2 / 1.57
[H+]^2 = 2.669 * 10^-5
[H+] = 5.166 * 10^-3
pH(9% 醋酸) = - log(5.166 * 10^-3)
= 2.29
希望解答到你 ^^
參考: My knowledge
2007-10-25 12:39 am
醋酸 約 pH = 2
所以
9% 醋酸 約 pH = 3
所以
9% 醋酸 約 pH = 3
收錄日期: 2021-04-13 14:00:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071019000051KK01344