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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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vanessa_vela vanessa_vela
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2 years ago
An iron plate of 0.559 m2 surface area is to be chrome plated using a chromic acid-sulfuric acid plating bath. The anode and cathode half-equations are:

Cathode: Cr2O72-(aq) + 14 H+(aq) + 12 e-→ 2 Cr(s) + 7 H2O(l) E° = 0.320 V
Anode: 2 H2O(l) → O2(g) + 4 H+(aq) + 4 e-E° = 1.229 V

Determine the minimum energy needed to produce a plating 0.115 mm thick on the iron plate. The density of chromium is 7.19 g/cm3.

▸ 526 kJ

▸ 780 kJ

▸ 1.05 × 103 kJ

▸ 4.68 × 103 kJ

▸ 9.36 × 103 kJ
Textbook 
General Chemistry: Principles and Modern Applications

General Chemistry: Principles and Modern Applications


Edition: 11th
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mmmm_dat_usernammmm_dat_userna
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vanessa_vela Author
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2 years ago
Helped a lot
bioc
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Brilliant ツ
mmmm_dat_userna
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2 hours ago
this is exactly what I needed
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