Answer:
The Emf of the given cell at [Fe2+] = 2.0 M and [Fe3+] = 1.9 M is 0.48 V
Explanation:
The half cell reaction can be written as :
Anode-Half (oxidation) :
......E = 0.77 V
(multiply this equation by 4 to balance the electrons)
Cathode-half (reduction)
....E= 1.23 V
According to Nernst Equation
n = number of electron transferred in the cell reaction = 4
The balanced equation is :
![log Q = \frac{[Fe^{3+}]^{4}}{[Fe^{2+}]^{4}}](https://tex.z-dn.net/?f=log%20Q%20%3D%20%5Cfrac%7B%5BFe%5E%7B3%2B%7D%5D%5E%7B4%7D%7D%7B%5BFe%5E%7B2%2B%7D%5D%5E%7B4%7D%7D)
![log Q = \left ( \frac{[Fe^{3+}]}{[Fe^{2+}]} \right )^{4}](https://tex.z-dn.net/?f=log%20Q%20%3D%20%5Cleft%20%28%20%5Cfrac%7B%5BFe%5E%7B3%2B%7D%5D%7D%7B%5BFe%5E%7B2%2B%7D%5D%7D%20%5Cright%20%29%5E%7B4%7D)
Insert the value of log Q in Nernst Equation:
(using :
)
The number of protons is the same as the atomic number of the element. So if you look for the atomic number of an element on your periodic table, then you can find the number of protons.
I believe there are three carbon atoms in propane
A voltaic cell spontaneously converts chemical energy to electrical energy. The correct option among all the options given in the question is option "2".
Actually voltaic cell is an electrochemical cell that
converts the chemical contained within it by the process of chemical reaction
to produce electrical energy. The voltaic cell contains an anode and a cathode.
Anode is an electrode where the oxidation occurs and cathode is the electrode
where reduction occurs. The oxidation and the reduction part occurs in two
separate parts of the cell known as half-cell.
If two nonmetals are bonded together. So look at your periodic table of elements and decide if the two elements that are being bonded are nonmetals or not.
