Question

How many grams og ag is displaced from agno3by 4 grams og mg?

Answer 1

The first thing you need to do is write an equation for the reduction (or oxidation- it doesn’t matter in this case) of silver:

Ag->Ag+ + e-

When 1 mole of silver metal is oxidized, it produces 1 mole of silver ion and 1 mole of electrons.

Now, for the actual calculations. In chemistry class, I assume that you learned that 1 Faraday=96500 Coulombs=96500 Amp seconds=1 mole of electrons. You should notice which conversion you’ll be using.

Use unit analysis and mole ratios to calculate your answer:

2.4 Amp * 20 min * (60 s/1 min) * (1 mol e-/96500 Amp•s) * (1 mol Ag/1 mol e-) * (107.87 g Ag/1 mol Ag) = 3.2 g Ag