0.222g Of A Divalent Metal Is Deposited When A Current Of 0.45 Amperes Is Passed Through A Solution Of It's Salt For 25 Minutes Using Appropriate Electrodes. Calculate The Relative Atomic Mass Of The Metal. (1 Faraday =96500c/mol)
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How many coulombs were used? That's coulombs = amperes x seconds = 0.45 A x 25 min x 60 sec/min = approx 700 but you need a better answer than this estimate.
96,500 coulombs will deposit (atomic mass/2) grams of the divalent metal. So
(atomic mass/2) x (700/96,500) = 0.222 g
Solve for atomic mass.