625. Draw up equations for half-reactions of oxidation or reduction, taking into account the acidity of the medium:

a) acidic environment

NO3→NO2

MnO4-→Mn2+

Cr3+→Cr2O72-

b) neutral environment

NO2-→NO3-

MnO4-→MnO2

SO32-→SO42-

c) alkaline environment

CrO2-→CrO42-

Al→AlO2-

NO3-→NH3

Read the product description. After payment, the system will redirect you to a page with a ready-made solution to problem 625 from the collection: Glinka N.L. Problems and exercises in general chemistry. Textbook for universities / Ed. V.A. Rabinovich and Kh.M. Rubina. – 23rd ed., revised. – L.: Chemistry, 1985. – 264 p., ill. The solution is a document formatted in MS Word.
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