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

question 92

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 one of the following reactions does not represent part or all of what is happening?

• A)Al \(\to\) Al³⁺ + 3 e^-
• B)Ag⁺ + e^-\(\to\) Ag
• C)2 HCO₃^-+S^2-\(\to\) H₂S + 2 CO₃^2-
• D)3 Ag₂S + 2 Al +3 H₂O \(\to\) 6 Ag + Al₂O₃ +3 H₂S
• E)2 HCO₃^-+Ag₂S \(\to\) H₂S + 2 CO₃^2- + 2 Ag

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