Multiple Choice
What is the correct name for the ion S^{2-}?
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2. Atoms & Elements
Ions
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Which of the following ions is most closely associated with bases?
A
hydroxide (OH^-)
B
ammonium (NH_4^+)
C
carbonate (CO_3^{2-})
D
hydrogen (H^+)
Verified step by step guidance1
Recall the Arrhenius and Brønsted-Lowry definitions of acids and bases: bases are species that can accept protons (H^+) or increase the concentration of hydroxide ions (OH^-) in solution.
Identify the ions given: hydroxide (OH^-), ammonium (NH_4^+), carbonate (CO_3^{2-}), and hydrogen (H^+).
Analyze each ion's typical behavior in aqueous solution: hydroxide (OH^-) is known to increase the pH by accepting protons, making it a classic base.
Ammonium (NH_4^+) is the conjugate acid of ammonia and tends to donate protons, so it behaves as an acid rather than a base.
Carbonate (CO_3^{2-}) can act as a base by accepting protons, but hydroxide (OH^-) is more directly associated with basicity; hydrogen ion (H^+) is an acid, not a base.
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