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

question 120

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 following statements is correct?

• A)Aluminum ions react with S^2-,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.

Comprehend the fundamental metabolic processes that sustain life in organisms.

Recognize the basic unit of chemical elements and their significance in biology.

Understand the role of homeostasis in regulating biological processes.

Familiarize with the major themes and concepts in biology including cellular composition, evolution, and information transmission.

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Definitions:

Oldest Terrain

The oldest exposed areas of the Earth's crust, which have survived weathering, erosion, and tectonic activity over vast geological timescales.

Alien World

A term often used to describe planets or moons outside of Earth that posses environments and characteristics markedly different from those found on Earth.

Slope Failure

Refers to the down-slope movement of soil, rock, or debris due to gravity, often leading to landslides.

Rift

A linear zone where the Earth's crust and lithosphere are being pulled apart and is an area of seismic activity and volcanism.