1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Hatshy [7]
2 years ago
5

Identify which redox reactions occur spontaneously in the forward direction. Check all that apply.

Chemistry
1 answer:
lidiya [134]2 years ago
7 0

<u>Answer:</u>

<u>For a:</u> The reaction is not spontaneous.

<u>For b:</u> The reaction is spontaneous.

<u>For c:</u> The reaction is not spontaneous.

<u>For d:</u> The reaction is spontaneous.

<u>Explanation:</u>

For the reaction to be spontaneous, the Gibbs free energy of the reaction must come out to be negative.

Relationship between standard Gibbs free energy and standard electrode potential follows:

\Delta G^o=-nFE^o_{cell}

For a reaction to be spontaneous, the standard electrode potential must be positive.

To calculate the E^o_{cell} of the reaction, we use the equation:

E^o_{cell}=E^o_{cathode}-E^o_{anode}       .......(1)

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

  • <u>For a:</u>

The chemical reaction follows:

Fe(s)+Mn^{2+}(aq.)\rightarrow Fe^{2+}(aq.)+Mn(s)

We know that:

E^o_{Fe^{2+}/Fe}=-0.44V\\E^o_{Mn^{2+}/Mn}=-1.18V

Calculating the E^o_{cell} using equation 1, we get:

E^o_{cell}=-1.18-(-0.44)=-0.74V

As, the standard electrode potential is coming out to be negative. So, the reaction is not spontaneous.

  • <u>For b:</u>

The chemical reaction follows:

Fe(s)+2Ag^{+}(aq.)\rightarrow Fe^{2+}(aq.)+2Ag(s)

We know that:

E^o_{Fe^{2+}/Fe}=-0.44V\\E^o_{Ag^{+}/Ag}=0.80V

Calculating the E^o_{cell} using equation 1, we get:

E^o_{cell}=0.80-(-0.44)=1.24V

As, the standard electrode potential is coming out to be positive. So, the reaction is spontaneous.

  • <u>For c:</u>

The chemical reaction follows:

Zn(s)+Mg^{2+}(aq.)\rightarrow Zn^{2+}(aq.)+Mg(s)

We know that:

E^o_{Zn^{2+}/Zn}=-0.76V\\E^o_{Mg^{2+}/Mg}=-2.37V

Calculating the E^o_{cell} using equation 1, we get:

E^o_{cell}=-2.37-(-0.76)=-1.61V

As, the standard electrode potential is coming out to be negative. So, the reaction is not spontaneous.

  • <u>For d:</u>

The chemical reaction follows:

2Al(s)+3Pb^{2+}(aq.)\rightarrow 2Al^{3+}(aq.)+3Pb(s)

We know that:

E^o_{Al^{3+}/Al}=-1.66V\\E^o_{Pb^{2+}/Pb}=-0.13V

Calculating the E^o_{cell} using equation 1, we get:

E^o_{cell}=-0.13-(-1.66)=1.53V

As, the standard electrode potential is coming out to be positive. So, the reaction is spontaneous.

You might be interested in
Using the data in the tables and Coulomb's law, calculate the energy change for this reaction (per formula unit of KF).
nata0808 [166]

the answer is 95 kg/mol

7 0
3 years ago
The carbohydrates seen here contains 3 common elements.They are....
Llana [10]
The answer is A),<span>carbon,hydrogen,and oxygen



Hope this helps
</span>
6 0
3 years ago
Read 2 more answers
What is the difference between the number of electrons in an atom of selenium?
azamat

Explanation:

Supposing we have to find the difference between the number of electrons in Selenium and Aluminium.

Well, electrons can be transformed to an atomic number, so if SE is 34, that means it has 34 electrons. AI has an atomic number of 13, which means it has 13 electrons. So the difference is that more electrons than AI are available from SE.

3 0
2 years ago
Which is a property of both alkenes and alkynes?
musickatia [10]
Their boiling points tend to increase with chain length.<span>
</span>
6 0
3 years ago
Read 2 more answers
Can someone give me a answer on why should renewable resources be used wisely?
irina [24]

We should use renewable resources wisely because <u>if we over use them the resources we already have will decline.</u>

5 0
2 years ago
Read 2 more answers
Other questions:
  • If I fill a tall glass with water and then transfer the water to a shorter glass, it appears there is more water. Is there more
    8·1 answer
  • What is the value for ∆Soreaction for the following reaction, given the standard entropy values? 2 Al (s) + 3Cl2(g) 2AlCl3(s)
    10·2 answers
  • Suppose you are asked to find the area of a rectangle that is 2.1-cm wide by 5.6-cm long. Your calculator answer would be 11.76
    8·1 answer
  • When energy is transferred to ocean water from the moving air above it , what happens to most of the energy.
    7·2 answers
  • Which of the following is NOT something that Earth's atmosphere protects us from? A. meteoroids B. ultraviolet light C. greenhou
    5·2 answers
  • Suppose that 3.74 ml of carbon dioxide (C02) accidentally escaped during the experiment, what volume in liters would that be
    15·1 answer
  • What feature of the sun changes to create the solar cycle?
    5·1 answer
  • Which of the following colors is/are produced when white light from sun is passed through a prism?
    8·1 answer
  • What is the volume, in liters, of 13.5 moles of a gas at STP? (STP = 273.15K, 1 atmosphere)
    9·1 answer
  • What is the solubility of potassium chloride at 20 C?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!