Question

Виберіть усі рівняння окисно - відновних реакцій. А ) H2 + CI2 = 2HCIБ ) 2HCI + Ca = CaCI2 + H2В ) Fe (OH)3 + 3HCI = FeCI3 + 3H2OГ ) MgCO3 + 2HCI = MgCI2 +CO2 + H2O​

Answer 1

Ответ:

Объяснение:

А ) H2 + CI2 = 2HCI (водород окисляется, хлор восстанавливается)

Б ) 2HCI + Ca = CaCI2 + H2 (кальций окисляется, водород восстанавливается)

Answer 2

Oxidation-Reduction Reactions:

Oxidation-reduction reactions, also known as redox reactions, involve the transfer of electrons between reactants. In these reactions, one species loses electrons (oxidation) while another species gains electrons (reduction). To determine the redox reactions in the given options, we need to identify the species that are being oxidized and reduced.

Let's analyze each option:

A) H2 + Cl2 = 2HCl In this reaction, hydrogen (H2) is being oxidized to form hydrogen chloride (HCl), while chlorine (Cl2) is being reduced. The oxidation state of hydrogen changes from 0 to +1, indicating oxidation, while the oxidation state of chlorine changes from 0 to -1, indicating reduction.

B) 2HCl + Ca = CaCl2 + H2 In this reaction, hydrogen chloride (HCl) is being oxidized to form calcium chloride (CaCl2), while calcium (Ca) is being reduced. The oxidation state of hydrogen changes from -1 to 0, indicating reduction, while the oxidation state of calcium changes from 0 to +2, indicating oxidation.

C) Fe(OH)3 + 3HCl = FeCl3 + 3H2O In this reaction, iron(III) hydroxide (Fe(OH)3) is being oxidized to form iron(III) chloride (FeCl3), while hydrochloric acid (HCl) is being reduced. The oxidation state of iron changes from +3 to +3, indicating no change, while the oxidation state of chlorine changes from -1 to 0, indicating reduction.

D) MgCO3 + 2HCl = MgCl2 + CO2 + H2O In this reaction, magnesium carbonate (MgCO3) is being oxidized to form magnesium chloride (MgCl2), while hydrochloric acid (HCl) is being reduced. The oxidation state of magnesium changes from +4 to +2, indicating reduction, while the oxidation state of chlorine changes from -1 to 0, indicating reduction.

Therefore, the redox reactions among the given options are: A) H2 + Cl2 = 2HCl B) 2HCl + Ca = CaCl2 + H2 D) MgCO3 + 2HCl = MgCl2 + CO2 + H2O

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