Chemistry, 13.07.2020 19:01 Goosebumpsestoybox

what is the calculated value of the cell potential at 298 k for an eleectrochemical cell with the following reaction, when the Cl2 pressure is 1.31 atm, the cl- concentration is at

Answers: 3

Show answers

Answers

Answer from: layja9

HERE IS THE COMPLETE QUESTION

what is the calculated value of the cell potential at 298 k for an electrochemical cell with the following reaction, when the Cl2 pressure is 1.31 atm, the cl- concentration is at 1.28M, and the Ni2+ concentration is 1.24M

$Cl_{2(g)} + Ni _{(s)} \to 2Cl^-_{aq} + Ni^{2+}_{aq}$

$\mathbf{E_{cell} = +1.4962 \ V}$

Explanation:

From the given question;

We can see that Nickel is oxidized and Chlorine is reduced. We also known that Oxidation occurs at the anode while reduction occurs at the cathode.

SO the Oxidation and the reduction reaction can be expressed as shown below.

Oxidation : $Ni_{s} \to Ni ^{2+}_{aq} + 2e^- \ \ \ \ E^0 = -0.26$

Reduction : $Cl_{2(g)} + 2e^- \to 2Cl^- _{(aq)} \ \ \ \ E^0} = 1.36$

$Cl_{2(g)} + Ni _{(s)} \to 2Cl^-_{aq} + Ni^{2+}_{aq}$

$E^0_{cell} = E^0_{cathode}-E^0_{anode}$

$E^0_{cell} = E^0_{Cl_2/Cl^-}-E^0_{Ni^{2+}/Ni}$

$E^0_{cell} = +1.36 - (-0.26)$

$E^0_{cell} = +1.62 \ V$

By applying Nernst Equation; we have :

$E_{cell} = E^0_{cell}- (\dfrac{0.0591}{n}) \ log Q$

where

n= 2 moles

$Q= \dfrac{[Cl^-]^2[Ni^{2+}]}{P_{Cl_2}}$

$E_{cell} = +1.62 \ V}- (\dfrac{0.0591}{2}) \ log \dfrac{[Cl^-]^2[Ni^{2+}]}{P_{Cl_2}}$

$E_{cell} = +1.62 \ V}- (\dfrac{0.0591}{2}) \ log \dfrac{[1.28]^2[1.24]}{1.31*10^{-4}}$

$E_{cell} = +1.62 \ V}- (0.02955) \ log \dfrac{[1.6384][1.24]}{1.31*10^{-4}}$

$E_{cell} = +1.62 \ V}- (0.02955) \ log \dfrac{[1.6384*1.24]}{1.31}*10^{4}$

$E_{cell} = +1.62 \ V}- (0.02955) \ log \dfrac{[2.031616]}{1.31}*10^{4}$

$E_{cell} = +1.62 \ V}- (0.02955) * \ log (1.55085*10^{4})$

$E_{cell} = +1.62 \ V}- (0.02955) * \ log (1.55085)+ log \ 10^{4}$

$E_{cell} = +1.62 \ V}- (0.02955) * \ 0.1905 + 4$

$E_{cell} = +1.62 \ V}- (0.02955) * \ 4.1905$

$E_{cell} = +1.62 \ V}- 0.1238$

$\mathbf{E_{cell} = +1.4962 \ V}$

Answer from: Quest

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation:

Answer from: Quest

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

Another question on Chemistry

Chemistry, 22.06.2019 10:00

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

Answers: 1

Answer

Chemistry, 22.06.2019 17:30

What type of organic molecule comprises the majority of a potato?

Answers: 1

Answer

Chemistry, 22.06.2019 19:30

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.

Answers: 2

Answer

Chemistry, 22.06.2019 21:30

What is the correct name for the compound cocl3? a) cobalt(i) chloride b) cobalt(i) chlorate c) cobalt(ii) chlorate d) cobalt(iii) chloride

Answers: 1

Answer

You know the right answer?

what is the calculated value of the cell potential at 298 k for an eleectrochemical cell with the fo...

Questions