在standardization of sodium thiosulphate experiment,為什麼加入硫酸後要立刻滴定?
回答 (1)
2019-11-11 12:09 am
In acidic solution, thiosulphate ions undergo decomposition according to the following equation:
2H⁺(aq) + S₂O₃²⁻(aq) → S(s) + SO₂(aq/g) + H₂O(l)
However, the rate of the above decomposition is slow. In order to minimize the effect of the decomposition on experiment result, the titration must be done immediately after the addition of sulphuric acid.
2H⁺(aq) + S₂O₃²⁻(aq) → S(s) + SO₂(aq/g) + H₂O(l)
However, the rate of the above decomposition is slow. In order to minimize the effect of the decomposition on experiment result, the titration must be done immediately after the addition of sulphuric acid.
收錄日期: 2021-05-01 23:24:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20191110155844AAznePO