A asked in Science & MathematicsPhysics · 1 month ago

How much platinum would be produced by passing a 2.0 ampere current through a solution of Pt^2+ for 30. minutes?

How much platinum would be produced by passing a 2.0 ampere current through a solution of Pt^2+ for 30. minutes? Answer much be in grams. 

Please describe your answers clearly and include steps.  

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  • 1 month ago
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    1 amp = 1 coulomb/sec

    charge = current x time = 2 amps x 30 min x 60s/min = 3600 coulombs

    1 C = 6.242e18 electrons

    3600 C x 6.242e18 electrons/C = 2.25e22 electrons

    it takes 2 electrons to deposit 1 Pt atom, so 1.124e22 atoms of Pt

    Pt is 195.1 g/mol

    6.022e23 atoms/mole      Avogadro constant

    1.124e22 atoms x 1mole/6.022e23 atoms x 195.1 g/mol = 3.64 g

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