Question

5. (86) Уравняйте и определите тип химических реакций: Схема реакции Тип химической реакции А. Na + 02 → Na2O В. Ca + HNO3 – Ca(NO3)2 + H2 с. Hgo - Hg + O2 D. Zn(OH)2 + HCI - ZnCl2 + H2O

Answer 1

Ответ:

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Answer 2

Chemical Reactions and their Types

Let's analyze each chemical reaction and determine their types:

A. Na + O2 → Na2O - This is a combination reaction, also known as a synthesis reaction. - In this reaction, sodium (Na) reacts with oxygen (O2) to form sodium oxide (Na2O). - The reaction can be represented as: 2Na + O2 → 2Na2O. [[1]]

B. Ca + HNO3 → Ca(NO3)2 + H2 - This is a displacement reaction, specifically a single displacement reaction. - In this reaction, calcium (Ca) reacts with nitric acid (HNO3) to form calcium nitrate (Ca(NO3)2) and hydrogen gas (H2). - The reaction can be represented as: Ca + 2HNO3 → Ca(NO3)2 + H2. [[2]]

C. HgO → Hg + O2 - This is a decomposition reaction. - In this reaction, mercury(II) oxide (HgO) decomposes into mercury (Hg) and oxygen gas (O2). - The reaction can be represented as: 2HgO → 2Hg + O2. [[3]]

D. Zn(OH)2 + HCl → ZnCl2 + H2O - This is a double displacement reaction. - In this reaction, zinc hydroxide (Zn(OH)2) reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and water (H2O). - The reaction can be represented as: Zn(OH)2 + 2HCl → ZnCl2 + 2H2O. [[4]]

I hope this helps! Let me know if you have any further questions.