H H H H H H Predict the species that will be reduced first if the following mixt

Question

H H H H H H Predict the species that will be reduced first if the following mixture of moltedn salts undergoes electrolysis. In the nuclear transmutation represented by ^14_7N(^1_0n,^1_1p)?, what is the product? What is the cathode in an alkaline battery? The purpose of the salt bridge in an electrochemical cell is to _____. Provide a means for electrons to travel from the anode to the cathode provide oxygen to facilitate oxidation at the anode maintain electrical neutrality in the half-cells via migration of ions provide a means for electrons to travel from the cathode to the anode provide a source of ions to react at the anode and cathode The cell potential (E degree cell) for the reaction below is+0.63 V. The cell potential for this reaction is _____ V when [ Zn^2^+] = 3.0 M and [Pb^2+] = 2.0 x 10^-4 M at 25 degree C. Pb^2+ (aq) + Zn (s) right arrow Zn^2+ (aq) + Pb (s) 0.40 0.75 0.63 0.86 0.51

Explanation / Answer

18)

Fe3+ + e- ----> Fe2+ ; E = 0.77 V

Mg2+ + 2e- --------> Mg ; E = -2.36 V

Zn2+ + 2e- ------> Zn ; E = -0.76 V

Br- & I- are already present in their reduced forms

Since, Fe3+ has the greatest reduction potential, therefore it will be reduced first.

19) Transmutation is the chemical process of converting a radioactive element or istope into another element.

Thus, 14N7 ----> 12C6 + 1n0 + 1p1

20) The correct option is:- (A)

21) Ecell = E0cell - (0.059/2)*log{[Zn2+]/[Pb2+]} = 0.63 - (0.059/2)*log(3/0.0002) = 0.507 V

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