Multiple Choice
How are anions formed?
2. Atoms & Elements
Ions
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What two ions are formed when water dissociates?
A
Sodium ion (Na+) and Chloride ion (Cl-)
B
Calcium ion (Ca2+) and Carbonate ion (CO3 2-)
C
Ammonium ion (NH4+) and Nitrate ion (NO3-)
D
Hydrogen ion (H+) and Hydroxide ion (OH-)
Verified step by step guidance1
Water (H₂O) is a polar molecule, meaning it has a partial positive charge on one side and a partial negative charge on the other side.
When water dissociates, it breaks apart into ions. This process is known as autoionization or self-ionization.
The dissociation of water can be represented by the chemical equation:
In this equation, water dissociates into a hydrogen ion (H⁺) and a hydroxide ion (OH⁻).
Understanding the dissociation of water is crucial for studying acid-base chemistry, as the concentration of H⁺ and OH⁻ ions determines the pH of a solution.
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