# Write down the reaction equations 1) potassium-potassium hydroxide-potassium carbonate-potassium

Write down the reaction equations 1) potassium-potassium hydroxide-potassium carbonate-potassium chloride-potassium sulfate 2) Sulfur-iron sulfide (2) -hydrogen sulfide-sodium sulfide-sodium sulfate

Let’s carry out the above chain of reactions:

In order to obtain divalent copper nitrate salt from copper, we need to add nitric acid to copper. Also in this reaction, water and bivalent nitrogen oxide are formed.

Cu + 4 HNO₃ = Cu (NO₃) ₂ + 2 H₂O + 2 NO₂
Next, we take the copper nitrate salt and add potassium hydroxide. We get bivalent copper hydroxide and potassium nitrate salt.

Cu (NO₃) ₂ + 2 KOH = Cu (OH) ₂ + 2 KNO₃
The reaction takes place between substances such as bivalent copper hydroxide and sulfuric acid. Copper sulfate salt and water are formed.

Cu (OH) ₂ + H₂SO₄ = CuSO₄ + 2 H₂O
To get bivalent copper hydroxosulfate. We need to add ammonium hydride to the copper sulfate salt.

2 CuSO₄ + 2 NH₄OH = (СuOH) ₂SO₄ + (NH₄) ₂SO₄
The last reaction is the production of copper sulfate by the reaction of copper hydrogen sulfate with sulfuric acid.

(СuOH) ₂SO₄ + H₂SO₄ = 2 CuSO₄ + 2 H₂O.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.