Question

Скласти рівняння реакцій окиснення речовин (в дужках вказана валентність): A) Ca + O2→; Б) P(III) + O2 →; B) H2 + O2 →; Г) CH4 + O2 →.​

Answer 1

Відповідь:

Ок

Пояснення:

а) 2Ca+O2=2CaO

б) 4P+3O2=2P2O3

в) 2H2+O2=2H2O

г) CH4+2O2=2H2O+CO2

Answer 2

Equations of Oxidation Reactions:

A) Ca + O2 → B) P(III) + O2 → C) H2 + O2 → D) CH4 + O2 →

Let's balance each equation and determine the oxidation states of the elements involved.

A) Ca + O2 → CaO In this reaction, calcium (Ca) is oxidized from an oxidation state of 0 to +2, while oxygen (O) is reduced from an oxidation state of 0 to -2. The balanced equation is: 2Ca + O2 → 2CaO [[1]].

B) P(III) + O2 → P(V) In this reaction, phosphorus (P) is oxidized from an oxidation state of +3 to +5, while oxygen (O) is reduced from an oxidation state of 0 to -2. The balanced equation is: 4P + 5O2 → 2P2O5 [[2]].

C) H2 + O2 → H2O In this reaction, hydrogen (H) is oxidized from an oxidation state of 0 to +1, while oxygen (O) is reduced from an oxidation state of 0 to -2. The balanced equation is: 2H2 + O2 → 2H2O [[3]].

D) CH4 + O2 → CO2 + H2O In this reaction, carbon (C) is oxidized from an oxidation state of -4 to +4, while oxygen (O) is reduced from an oxidation state of 0 to -2. The balanced equation is: CH4 + 2O2 → CO2 + 2H2O [[4]].

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