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Describe the redox reaction. Check all that apply. Aluminum atoms transfer electrons to chlorine atoms. Zinc is reduced. Zinc is the reducing agent. The oxidation number of chlorine does not change. Aluminum is oxidized.

Respuesta :

The options that apply are:

  • Zinc is reduced.
  • The oxidation number of chlorine does not change.
  • Aluminum is oxidized.

For the reaction:

2AI(s) + 3ZnCI₂(g) → 3Zn(s) + 2AICI₃(aq).

For the elements in the reactants side:

Al has (0) oxidation state and converted to (+3) oxidation state in the products (AlCl₃), which means Al is oxidized and it is the reducing agent.

So, we can check that: Aluminum is oxidized.

Zn has the oxidation state (+2) in the reactants side (ZnCl₂) and converted to (0) in the products side (Zn), which means that Zn is reduced and it is the oxidizing agent.

So, we can check that: Zinc is reduced.

and can not check: Zinc is the reducing agent.  

The oxidation state of Cl does not change, it is the same in both sides (-1).

So, we can check: The oxidation number of chlorine does not change.

and can not check: Aluminum atoms transfer electrons to chlorine atoms.

So, the choices will be:

  • Zinc is reduced.
  • The oxidation number of chlorine does not change.
  • Aluminum is oxidized.

What are redox reactions ?

A chemical process known as an oxidation-reduction (redox) reaction includes the exchange of electrons between two substances. Any chemical process in which the oxidation number of a molecule, atom, or ion changes by acquiring or losing an electron is referred to as an oxidation-reduction reaction. Many fundamental processes of life, such as photosynthesis, respiration, combustion, and corrosion or rusting, depend on redox reactions.

A reduced half and an oxidized half, which always occur together, make up redox processes. While the oxidized half experiences electron loss and an increase in oxidation number, the reduced half obtains electrons and the oxidation number declines. The mnemonic devices OIL RIG, which stand for "oxidation is loss" and "reduction is gain," are simple ways to memorize this. The total number of electrons in a redox reaction remains unchanged. In the reduction half reaction, another species absorbs those that were released in the oxidation half reaction.

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