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
anzhelika [568]
3 years ago
11

An electrochemical cell is based on the following two half-reactions:

Chemistry
1 answer:
Hatshy [7]3 years ago
4 0

Answer:

Cell potential at 25 C is 1.69 V

Explanation:

The given half cell reactions are:

Oxidation (Anode)

Pb(s)\rightarrow Pb^{2+}(aq, 0.16 M )+2e^{-}-------(1)

where E°= -0.13 V

Reduction (Cathode):

MnO_{4}^{-}(aq, 1.70 M )+4H^{+}(aq, 1.9 M )+3e^{-}\rightarrow MnO_{2}(s)+2H_{2}O(l)------(2)

where E°= +1.51 V

The net reaction is obtained by:

Eq (1) * 3 + Eq(2) * 2

2MnO_{4}^{-}(aq, 1.70 M )+8H^{+}(aq, 1.9 M )+3Pb(s)\rightarrow  2MnO_{2}(s)+4H_{2}O(l)+3Pb^{2+}(aq, 0.16 M)

The value of E°(cell) is:

E_{cell}^{0}=E_{cathode}^{0}+E_{anode}^{0}=1.51-(-0.13)=1.64 V

The E(cell) at 25 C is calculated based on the nernst equation:

E_{cell}=E_{cell}^{0}-\frac{0.02568}{n}ln\frac{[Pb^{2+}]^{3}}{[H^{+}]^{8}[MnO_{4}^{-}]^{2}}

where n = number of electrons = 6

E_{cell}=1.64-\frac{0.02568}{6}ln\frac{[0.16]^{3}}{[1.9]^{8}[1.70]^{2}}=1.69 V

You might be interested in
Briefly compare and contrast the relative resistance to ph change of the seven solutions
JulsSmile [24]
PH  stands for "Potential Hydrogen" and the PH scale ranges from 0-14. PH refers to the ability to attract hydrogen ions.

The PH of a solution either indicates acidity of the solution or alkalinity of the solution. A solution which has PH 7 above is a base solution where a solution with PH less than 7 is an acidic solution.
6 0
3 years ago
If one body is positively charged and another one is negatively charged free electrons tend to ?
Inga [223]
Free electrons tend to go from the negatively charged body to the positively charged body
6 0
3 years ago
Read 2 more answers
How many atoms are in 2.45 moles of hydrogen
allochka39001 [22]

Answer:

There are 1.4754246675000002e+24 atoms of Hydrogen within the measurement of 2.45 moles of hydrogen!

Explanation:

6 0
3 years ago
If 2 objects have the same volume, but one has more mass than the other, are the densities the same or different? Explain
laiz [17]

The one with higher mass has a higher density because it fits more mass into the same amount of space (volume).

4 0
3 years ago
g When copper(II) chloride and sodium carbonate solutions are combined, solid copper(II) carbonate precipitates, leaving a solut
Elden [556K]

Answer:

When copper(II) chloride and sodium carbonate solutions are combined, solid copper(II) carbonate precipitates, leaving a solution of sodium chloride. Write the conventional equation, total ionic equation, and net ionic equation for this reaction.

Explanation:

The word equation for the reaction is:

Copper (II) chloride(aq) + sodium carbonate (aq) ->sodium chloride (aq) +           copper carbonate(s)

The balanced chemical equation of the reaction is:

CuCl_2(aq)+Na_2CO_3(aq)->2NaCl(aq)+CuCO_3(s)

The complete ionic equation is:

Cu^2+(aq)+2Cl^-(aq)+2Na^+(aq)+CO_3^2^-(aq)->2Cl^-(aq)+2Na^+(aq)+CuCO_3(s)\\

The net ionic equation is obtained from the complete ionic equation after removing the spectator ions:

Cu^2^+(aq)+CO_3^2^-(aq)->CuCO_3(s)

5 0
2 years ago
Other questions:
  • An ionic bond is _?_
    5·1 answer
  • Help answer the questions above
    10·2 answers
  • Why do historians analyze historical events and cause and effect relationship
    12·2 answers
  • When the hydronium ion concentration of a solution is increased by a factor of 10, it means that
    13·1 answer
  • You are visiting your Great Aunt Agnes. She is about 65 years
    13·1 answer
  • If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume is decreased to 20.0 mL?
    9·1 answer
  • How many moles of water are contained in 3.58 x 10^24 molecules? 6.022
    10·1 answer
  • Help Tell me the answer.
    6·1 answer
  • Which property describes the shininess of an element?
    8·2 answers
  • You are asked to weigh approximately 0. 4g of acetylsalicylic acid to the nearest mg. When you enter the data in grams in your l
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!