Question

Вкажіть реакцію сполучення: А Zn + O2 → ZnO; Б KMnO4 → K2MnO4 + MnO2 + O2↑; В KClO3 → KCl + O2↑; Г Ca(OH)2 + HCl → CaCl2 + H2O.

Answer 1

Объяснение:

А 2Zn + O2 → 2ZnO; сполучення

Б 2KMnO4 → K2MnO4 + MnO2 + O2↑; розкладу

В 2KClO3 → 2KCl + 3O2↑; розкладу

Г Ca(OH)2 + 2HCl → CaCl2 + H2O. нейтралізації) обміну)

Answer 2

Reaction A: Zn + O2 → ZnO

The reaction between zinc (Zn) and oxygen (O2) produces zinc oxide (ZnO). This is a synthesis reaction where two elements combine to form a compound. Zinc oxide is a white powder that is commonly used in various applications such as sunscreen, rubber manufacturing, and ceramics [[1]].

Reaction B: KMnO4 → K2MnO4 + MnO2 + O2↑

The reaction involving potassium permanganate (KMnO4) results in the formation of potassium manganate (K2MnO4), manganese dioxide (MnO2), and the liberation of oxygen gas (O2). This is a redox reaction where the oxidation state of manganese changes from +7 in KMnO4 to +6 in K2MnO4 and +4 in MnO2. Potassium permanganate is a strong oxidizing agent and is commonly used in laboratory experiments and as a disinfectant [[2]].

Reaction C: KClO3 → KCl + O2↑

The reaction between potassium chlorate (KClO3) and heat or a catalyst produces potassium chloride (KCl) and releases oxygen gas (O2). This is a decomposition reaction where a compound breaks down into simpler substances. Potassium chlorate is often used in fireworks and matches due to its ability to release oxygen when heated [[3]].

Reaction D: Ca(OH)2 + HCl → CaCl2 + H2O

The reaction between calcium hydroxide (Ca(OH)2) and hydrochloric acid (HCl) forms calcium chloride (CaCl2) and water (H2O). This is a neutralization reaction where an acid and a base react to form a salt and water. Calcium hydroxide is commonly known as slaked lime and is used in various applications such as wastewater treatment and as a pH regulator in agriculture [[4]].

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