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3 years ago

23 Which term identifies the half-reaction that occurs at the anode of an operating electrochemical cell?

Chemistry

2 answers:

Debora [2.8K]3 years ago

8 0

Answer: The correct answer is Option 1.

Explanation:

Electrochemical cell is defined as the device that is used for the conversion of the chemical energy produced in a redox reaction into the electrical energy. In this cell, oxidation reaction occurs at anode and reduction reaction occurs at cathode.

For the given options:

Option 1: Oxidation reaction

Oxidation reaction is defined as the chemical reaction where a substance looses its electrons. The oxidation state of this substance gets increased and the substance gets oxidized.

$X\rightarrow X^{n+}+ne^-$

Option 2: Reduction reaction

Reduction reaction is defined as the chemical reaction where a substance gains electrons. The oxidation state of this substance gets reduced and the substance gets reduced.

$X^{n+}+ne^-\rightarrow X$

Option 3: Neutralization reaction

Neutralization reaction is defined as the chemical reaction where an acid reacts with a base to produce a salt and water molecule.

$HX+BOH\rightarrow BX+H_2O$

Option 4: Transmutation

This is defined as the process in which a nucleus is converted to another nucleus.

From the above information, at anode, oxidation reaction occurs. Thus, the correct answer is option 1.

k0ka [10]3 years ago

7 0

Oxidisation is the loss of electrons
Reduction is the gain of electrons
Neutralisation is the mix of acids and alkalis
Transmutation is the changing of an element from one to another.
The Anode is the positive electrode.
At the positive electrode, electrons are lost
So the process is Reduction (2)

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List of things that you’ll use in the scientific method

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Explanation:

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3 years ago

Below are the reduction half reactions for chemolithoautotrophic nitrification, where ammonia is a source of electrons and energ

SSSSS [86.1K]

Answer: The molecules of oxygen gas that will be reduced to water are 42 molecules

Explanation:

We are given:

$E^o_{(NO_2^-/NH_4)}=-0.41V\\E^o_{(O_2/H_2O)}=0.82V$

The substance having highest positive $E^o$ potential will always get reduced and will undergo reduction reaction. Here, oxygen will undergo reduction reaction will get reduced.

$NH_4$ will undergo oxidation reaction and will get oxidized.

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

The half reactions follows:

Oxidation half reaction: $NH_4\rightarrow NO_2^-+6e^-$ ( × 4)

Reduction half reaction: $O_2+4e^-\rightarrow 2H_2O$ ( × 6)

Overall reaction: $4NH_4+6O_2\rightarrow 4NO_2^-+12H_2O$

We are given:

Molecules of $NH_4$ = 28

By Stoichiometry of the reaction:

4 molecules of $NH_4$ reacts with 6 molecules of oxygen gas

So, 28 molecules of $NH_4$ will react with = $\frac{6}{4}\times 28=42$ molecules of oxygen gas

Hence, the molecules of oxygen gas that will be reduced to water are 42 molecules

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3 years ago

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The answer would be B.

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3 years ago

Which element is most plentiful in Earth's crust?

dem82 [27]

Answer:

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3 years ago

In redox half-reactions, a more positive standard reduction potential means I. the oxidized form has a higher affinity for elect

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Answer:

The 1st and 4th options are correct

I.the oxidized form has a higher affinity for electrons

IV. the greater the tendency for the oxidized form to accept electrons

Explanation:

Half reaction can be described as the oxidation or reduction reaction in a redox reaction.it is In the redox rection there is a change in the oxidation states of Chemical species involved. the oxidized form in the redox has a higher affinity for electrons and the greater the tendency for the oxidized form to accept electrons.

Standard reduction potential which is also referred to as standard cell potential can be described as the potential difference that exist between cathode and anode of the cell. In the standard reduction potential most times the species will be reduced which is usually analysed in a reduction half reaction.

(Standard Hydrogen Electrode) is utilized when determining the Standard reduction or potentials of a chemical specie. this is because of Hydrogen having zero reduction and oxidation potentials, as a result of this a measured potential of any species is compared with that of Hydrogen, the difference helps to know the potential reduction of that particular specie.

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4 years ago

23 Which term identifies the half-reaction that occurs at the anode of an operating electro­chemical cell?

23 Which term identifies the half-reaction that occurs at the anode of an operating electrochemical cell?