So2 + kmno4 + h2o = mnso4 + k2so4 + h2so4

     
Bạn đang xem: So2 + Kmno4 + H2O = Mnso4 + K2So4 + H2So4 Solve By Partial Equation Method Tại depsangtrong.com

Solution of $ce{KMnO4}$ is decolorised by $ce{SO2}$. Is this due to the reducing nature of $ce{SO2}$ or acidic nature of $ce{SO2}$ ?

I encountered following two explanations. While first one appears to be reasonable, I could not understand the second one.

Bạn đang xem: So2 + kmno4 + h2o = mnso4 + k2so4 + h2so4

Đang xem: So2 + kmno4 + h2o = mnso4 + k2so4 + h2so4

Reducing nature of $ce{SO2}$: $$ce{2KMnO4 +5SO2 +2H2O -> K2SO4 + 2MnSO4 +2H2SO4}$$

Acidic nature of $ce{SO2}$:

$$egin{align}ce{SO2 + 2H2O &-> H2SO4 + 2H}\ce{2H + O &-> H2O}\ce{2KMnO4 +3H2SO4 &-> K2SO4 + 2MnSO4 +3H2O + 5}\end{align}$$

Also, it is said that $ce{H2SO4}$ is a moderately strong oxidizing agent. How can $ce{H2SO4}$ reduce $ce{KMnO4}$ to $ce{MnSO4}$ (last equation)? Is the second explanation correct?

*

*

Potassium permanganate is a very strong oxidising agent (stronger than sulphuric acid). In acidic medium, $ce{Mn}$ gets reduced from its +7 oxidation state to +2 oxidation state. (n-factor is 5).$$ce{2KMnO4 + 3H2SO4 -> K2SO4 + 2MnSO4 + 3H2O + 5}$$

Since $ce{SO2}$ is a strong reducing agent, it reduces $ce{Mn}$ as denoted by the equation$$ce{5SO2 + 2KMnO4 + 2H2O -> 2H2SO4 + 2MnSO4 + K2SO4}$$

Both the reactions are viable. Because of the formation of $ ce{MnSO4}$ and the disappearance of $ ce{KMnO4}$, decolorisation occurs.

But sulphur dioxide reacts with water to produce sulphurous acid and not sulphuric acid. $$ ce{ SO2 + H2O —> H2SO3} $$Hence, the acidic nature reasoning doesn’t hold good.

*

Thanks for contributing an answer to depsangtrong.com Stack Exchange!

Please be sure to answer the question. Provide details and share your research!

But avoid

Asking for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.

Xem thêm: Các Ngày Lễ Trong Tháng 9 Có Ngày Gì Đặc Biệt, Tháng 9 Có Ngày Lễ Gì


READ: Kim Loại Al, Zn, Cu Tác Dụng Với H2So4 Đặc Nguội Không Tác Dụng Với:

Use MathJax to format equations. MathJax reference.

Xem thêm: Cấu Trúc As Well As Là Gì? Cách Dùng As Well As Trong Tiếng Anh

To learn more, see our tips on writing great answers.

Post Your Answer Discard

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged physical-depsangtrong.com redox or ask your own question.

*

site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. rev2021.7.7.39676

depsangtrong.com Stack Exchange works best with JavaScript enabled

*

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.


Post navigation


Previous: Câu 8 Nung 25 28 Gam Hỗn Hợp Feco3 Và Fexoy Trong Oxi Dư Tới Phản Ứng Hoàn Toàn
Next: Bút Màu Tô Màu – Bộ Tô Màu Cho Bé Giá Tốt Tháng 7, 2021