Hydrogen sulfide can be used in aqueous solutions to separate out metal ions. On the other hand, hydrogen sulfide in the air causes considerable damage to silver objects. When a silver goblet tarnished in the presence of Hydrogen sulfide (and oxygen), 1.20 mol of silver sulfide formed. What amount of silver was consumed.
To find the amount of silver consumed, we first need to calculate the molar ratio between silver sulfide (Ag2S) and silver (Ag).
The balanced chemical equation for the reaction between silver (Ag) and hydrogen sulfide (H2S) is as follows:
2 Ag + H2S -> Ag2S + H2
According to the balanced equation, 2 moles of silver react with 1 mole of hydrogen sulfide to produce 1 mole of silver sulfide. Therefore, the molar ratio between silver sulfide and silver is 1:2.
Given that 1.20 mol of silver sulfide (Ag2S) was formed, the amount of silver (Ag) consumed can be calculated as:
1.20 mol Ag2S x (2 mol Ag / 1 mol Ag2S) = 2.40 mol Ag
Therefore, 2.40 mol of silver was consumed in the reaction.