Question

c. Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)

Is this a redox reaction? (yes or no) _____________

If yes:

i. what is the oxidizing agent? ___________________

ii. what is the reducing agent? ___________________

iii. what species is being oxidized? __________________

iv. what species is being reduced? __________________

Answer 1

Answer :-

This reaction is redox reaction.

oxidizing agent :- Hydrogen (H)

reducing agent :- Zinc (Zn)

species is being oxidized :- Zinc (Zn)

species is being reduced :- Hydrogen (H)

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Explanation :-

The oxidation number of Hydrogen is decreased from +1 to 0. i.e. Hydrogen undergoes reduction and act as oxidising agent.

The oxidation number of Zinc is increased from 0 to +2. i.e. Zinc undergoes oxidation and act as reducing agent.

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Note :-

Oxidation :-

The loss of electrons is called oxidation.

The oxidation number of oxidized species increases.

Reduction :-

The gain of electrons is called reduction.

The oxidation number of oxidized species decreases.

Redox reaction :-  

The reaction in simultaneous oxidation and reduction take place is called redox reaction.

Oxidising Agent (Oxidant)	Reducing Agent (Reductant)
Causes oxidation	Causes reduction
Accepts electron(s)	Donates electron(s)
Itself undergoes reduction	Itself undergoes oxidation
Undergoes decrease in oxidation number	Undergoes increase in oxidation number

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