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A galvanic cell is assembled from one half cell with a nickel electrode immersed in Ni...

A galvanic cell is assembled from one half cell with a nickel electrode immersed in Ni 2+ aqueous solutions in one beaker where [Ni2+] = 1.2 M coupled to a second half cell with a chromium electrode immersed in a Cr3+ aqueous solution to give Ecell = +0.55 V at 25 °C.

3Ni2+(aq) + 2Cr(s) → 3Ni(s) + 2Cr3+(aq) Eϴ cell = +0.50 V

Calculate the concentration of the chromium ions [Cr3+] in solution.

(A) 1.9 x10^–1 M

(B) 6.7 x 10^1 M

(C) 1.0 x 10^–4 M

(D) 2.5 x 10^–9 M

(E) 3.8 x 10^–3 M

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Answer) Coco I comp ( ?M) || Me toys (1.2 M) Mics AL Anode • 2+ 2 Cow - 2.Crater + 6e At Cathode - 3 Ni Cay) + 6é → 3 Hics {nThe correct answer is E

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