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
juin [17]
3 years ago
13

Answer the following questions that relate to electrochemical reactions. (a) Under standard conditions at 25˚C, Zn(s) reacts wit

h Co2+(aq) to produce Co(s). (i) Write the balanced equation for the oxidation half reaction. (ii) Write the balanced net-ionic equation for the overall reaction. (iv) Calculate the standard potential, E˚, for the overall reaction at 25˚C.
Chemistry
2 answers:
Tresset [83]3 years ago
8 0

Answer:

Explanation:

Half cell equations:

Oxidation

Zn(s) --> Zn2+(aq) + 2e-

E° = 0.7618 V

Reduction

Co2+(aq) + 2e- --> Co(s)

E° = -0.28 V

Balanced net ionic equation

Co2+(aq) + Zn(s) --> Zn2+(aq) + Co(s)

Standard electrode potential, E°cell = E°cathode - E°anode

For an electrochemical reaction,

Standard electrode potential, E°cell = E°reduction - E°oxidation

= -0.28 - (0.7618)

= -1.0418 V

Elanso [62]3 years ago
7 0

Answer:

0.48 V

Explanation:

Zn(s) ------------> Zn^2+(aq) + 2e. Oxidation half equation (-0.76V)

Co^2+(aq) + 2e-----------> Co(s). Reduction half equation (-0.28)

Zn(s) + Co^2+(aq) -------------> Zn^2+(aq) + Co(s) overall redox equation

Zinc is the anode while cobalt is the cathode.

E°cell= E°cathode - E°anode

E°cell= -0.28-(-0.76)= 0.48 V

You might be interested in
PLEASE HELP ME ASAPPPP
sattari [20]
Boyle’s law gives the relationship between pressure and volume of gases. It states that at constant temperature the pressure of gas is inversely proportional to volume of gas.
PV = k
Where P is pressure V is volume and k is constant
P1V1 = P2V2
Parameters at STP are on the left side and parameters for the second instance are on the right side of the equation
P1 - standard pressure - 1.0 atm
Substituting the values in the equation
1.0 atm x 5.00 L = P x 15.0 L
P = 0.33 atm
New pressure is 0.33 atm
5 0
3 years ago
The constant
Zigmanuir [339]

Answer:

75 kJ/mol

Explanation:

The reactions occur at a rate, which means that the concentration of the reagents decays at a time. The rate law is a function of the concentrations and of the rate constant (k) which depends on the temperature of the reaction.

The activation energy (Ea) is the minimum energy that the reagents must have so the reaction will happen. The rate constant is related to the activation energy by the Arrhenius equation:

ln(k) = ln(A) -Ea/RT

Where A is a constant of the reaction, which doesn't depend on the temperature, R is the gas constant (8.314 J/mol.K), and T is the temperature. So, for two different temperatures, if we make the difference between the two equations:

ln(k1) - ln(k2) = ln(A) - Ea/RT1 - ln(A) + Ea/RT2

ln (k1/k2) = (Ea/R)*(1/T2 - 1/T1)

k1 = 8.3x10⁸, T1 = 142.0°C = 415 K

k2 = 6.9x10⁶, T2 = 67.0°C = 340 K

ln(8.3x10⁸/6.9x10⁶) = (Ea/8.314)*(1/340 - 1/415)

4.8 = 6.39x10⁻⁵Ea

Ea = 75078 J/mol

Ea = 75 kJ/mol

4 0
3 years ago
Describes the process by which gas
gavmur [86]

Answer:

condensation

Explanation:

hope it is helpful

4 0
3 years ago
Make a conclusion about the following question: What is the relationship between the volume of a gas and the pressure exerted on
Alinara [238K]

The relationship would be inversely proportional, meaning that as the volume increases, the pressure decreases, and the opposite is true as well, as the pressure increases, the volume decreases.

3 0
3 years ago
Is it possible for three or more elements to form a solid solution? Explain your answer.
elixir [45]
Yes it is possible because, olymorphismis when two or more crystal structures are possible for a material of given composition. Isomerismis when two or more polymer molecules or repeat units have the same composition, but different atomic arrangements.
3 0
3 years ago
Other questions:
  • If an atom had 7 electrons in second shell, it would need to ________ electron(s) to become stable.
    9·1 answer
  • PLEASEEEE HELP WITH THIS ID REALLY REALLY APPRECIATE IT
    13·1 answer
  • Becker did an experiment. Separately, Tracy did the exact same experiment. Becker and Tracy found they each got very different r
    7·2 answers
  • What is typically displayed on the y-axis of a solubility curve?
    8·1 answer
  • What is the value of youth participating in volunteering​
    15·1 answer
  • How many oxygen atoms are there in the following compound: 2HNO3<br> 3<br> 5<br> 6<br> 12
    11·2 answers
  • how many millilitres of water at 23 degree centigrade with the density of 1.00 g / ml must be mixed with 180 ml (about 6 oz) of
    6·1 answer
  • If the pH of a solution is 6.96, then the solution is a
    9·1 answer
  • What were the limitations of Newlands Law of Octaves.?<br><br> No spam ❌❌<br> or else (-_-メ)​
    13·2 answers
  • How many moles of nacl are required to make 500. 0 ml of a 0. 1 m solution of nacl?.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!