For this problem, we are being asked to identify the metal present in M(NO_{3})_{2} when it takes 74.1 s at 2.0 A to electrolyze a 0.0737 g of the sample

In this case, we need to find the *moles of metal using the Faraday's constant*. Then divide the mass of metal to determine the molar mass.

The __molar mass will tell us the identity of the metal.__

Notice that M(NO_{3})_{2} dissociates as:

M(NO_{3})_{2 }(aq) → M^{2+} (aq) + 2 NO_{3}^{- }(aq)

When a solution containing M(NO_{3})_{2} of an unknown metal M is electrolyzed, it takes 74.1 s for a current of 2.00 A to plate out 0.0737 g of the metal. The metal is

a. Cu

b. Zn

c. Mn

d. Mo

e. Pd

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Faraday's Constant concept. You can view video lessons to learn Faraday's Constant. Or if you need more Faraday's Constant practice, you can also practice Faraday's Constant practice problems.

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Our tutors rated the difficulty of*When a solution containing M(NO3)2 of an unknown metal M is ...*as medium difficulty.