This Is a True Story; Can You Explain What Happened

question 18

Multiple Choice

This is a true story; can you explain what happened? Prior to a really important dinner party, the hostess discovered that her silverware was very tarnished. She needed a quick fix. She remembered reading that the tarnish (Ag₂S) would be removed if you immersed the silverware in a hot solution of baking soda (NaHCO₃) in a pan lined with aluminum foil. So she did, and so it was, but she noticed a bit of a rotten egg smell (H₂S) being produced. Which one of the following statements cannot represent what might have been happening? Metal/Metal ion
E silver/silver(I) 0.799
Aluminum/aluminum(III) -1.677

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

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Definitions:

Positive Correlation

A relationship between two variables in which both variables move in the same direction, indicating that as one variable increases, the other also increases.

Alcohol Consumption

The act of drinking beverages containing ethanol, which can have various effects on health and behavior depending on the amount and frequency of intake.

Negative Correlation

A connection between two variables where one variable rises while the other falls.

Incidence of Dental Disease

Refers to the frequency or rate at which new cases of dental diseases occur in a population over a specified period of time.