Silver Tarnish Ag₂S) Can Be Removed by Immersing Silverware in a Hot

question 32

Multiple Choice

Silver tarnish Ag₂S) can be removed by immersing silverware in a hot solution of baking soda NaHCO₃) in a pan lined with aluminum foil; however, foul-smelling hydrogen sulfide gas H₂S) is produced.Which of the statements below is true?

• A)Aluminum ions react with S²⁺, form aluminum sulfide, and gaseous carbon dioxide is released.
• B)Silver ions in the presence of the baking soda NaHCO₃) oxidize sulfide to elemental sulfur that attacks the aluminum foil, which produces aluminum sulfide.
• C)The aluminum acts as a reducing agent for the silver
• I) in silver sulfide; then bicarbonate ion protonates the sulfide ion that is released.
• D)Aluminum is plated onto the silver surface, making it shiny again, and then the reaction of bicarbonate with aluminum oxide releases CO₂.
• E)Silver in Ag₂S reduces the aluminum, becomes metallic silver in the process, and releases hydrogen sulfide, H₂S.

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