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An atom or a molecule with either a positive or negative charge is referred to as a(n):
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2. Atoms & Elements
Ions
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Which of the following ions is positively charged and is responsible for making a solution acidic?
A
Cl^-
B
H^+
C
Na^+
D
OH^-
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Identify the charge on each ion given: Cl⁻ has a negative charge, H⁺ has a positive charge, Na⁺ has a positive charge, and OH⁻ has a negative charge.
Recall that an acidic solution is characterized by the presence of excess hydrogen ions (H⁺), which increase the solution's acidity.
Understand that ions like Cl⁻ and OH⁻ are negatively charged and do not contribute to acidity; OH⁻ actually makes a solution basic.
Recognize that Na⁺ is positively charged but is a spectator ion and does not affect the acidity of the solution.
Conclude that the ion responsible for making a solution acidic is H⁺, the positively charged hydrogen ion.
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