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Which of the following statements is true about ions?
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2. Atoms & Elements
Ions
Scelta multipla
What ions are formed when water dissociates?
A
Sodium ions (Na+) and chloride ions (Cl-)
B
Hydrogen ions (H+) and hydroxide ions (OH-)
C
Ammonium ions (NH4+) and nitrate ions (NO3-)
D
Calcium ions (Ca2+) and carbonate ions (CO3^2-)
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Understand the concept of water dissociation: Water (H₂O) can dissociate into ions. This process is known as autoionization or self-ionization.
Identify the ions formed: When water dissociates, it forms hydrogen ions (H⁺) and hydroxide ions (OH⁻).
Write the chemical equation for water dissociation: The dissociation of water can be represented by the equation:
Clarify the nature of the ions: Hydrogen ions (H⁺) are protons, and hydroxide ions (OH⁻) are negatively charged ions formed from water.
Relate to pH: The concentration of hydrogen ions (H⁺) in a solution determines its acidity, which is measured by pH.
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