Chemistry
14.09.2021 04:26
188
450
10
Solved by an expert

Determine the equilibrium constant, keq, at 25°c for the reaction 2br– (aq) + i2(s)

Determine the equilibrium constant, keq, at 25°c for the reaction 2br– (aq) + i2(s) br2(l) + 2i– (aq).
Show Answers
jackrider6563
jackrider6563
4,5(97 marks)
Electrochemical cell representation for above reaction is,

Br-/Br2//I2/I-

Reaction at Anode: Br2 + 2e-   →    2Br-               (1)
Reaction at Cathode: 2I-            →  I2   + 2e-          (2)

Standard reduction potential for Reaction 1 =  Ered(anode) = 1.066 v
Standard reduction potential for Reaction 2 = Ered(cathode) = 0.535 v

Eo cell = Ered(cathode)  -  Ered(anode)
            = 0.535 - 1.066
            = -0.531v

Now, we know that ΔGo = -nF (Eo cell)        (3)
Also, ΔGo = RTln(K)         (4)

Equation 3 and 4 we get,

ln (K)   = nF (Eo cell)  / RT
           = 2 X 96500 X (-0.531)/ (8.314 X 298)

∴ K = 1.085 X 10^-18.
pulidoshorty
pulidoshorty
4,9(65 marks)

The answer to your question is below

Explanation:

Atomic mass = 65.39 g

Searching this number in the periodic table we find that the element is Zinc.

Then:

# of Protons = 30

# of neutrons = atomic mass - # of protons

                       = 65.39 - 30

                        = 35.39

# of electrons = # of protons = 30

Popular Questions about the subject: Chemistry

I want to prepare a 1.2 M FeCl3 solution with 6ml of 3.6 M fecl3 how...
Chemistry
03.12.2021 07:41
What is released during Cellular Respiration? Energy from Glucose Energy...
Chemistry
07.12.2020 01:44
Water has the lowest solubility in which of the following liquids?...
Chemistry
24.09.2022 04:22
How is the law of conservation of mass applied to ecology?...
Chemistry
15.07.2020 00:55
How many molecules of cl2 would be formed from the reaction mixture...
Chemistry
09.07.2020 18:37
2n2o(g) +3o2(g) 4no2(g). which equilibrium expression is correct?...
Chemistry
26.03.2023 07:19
What is the specific heat of a substance if 17.0 grams of the substance...
Chemistry
03.03.2020 01:06
Which of the following best decribes the fluoride content of bottled...
Chemistry
16.06.2023 03:46

New questions by subject

Click on the sentence that has a contrast clue for the word incompetent?...
English
07.11.2021 07:38
Find all real square roots of -121....
Mathematics
01.08.2021 00:49
#
#
#
#
# #

We expand our knowledge with many expert answers