According to the Arrhenius Theory, a base is defined as a substance that:

Correct Answer: Increases OH⁻ (hydroxide ion) concentration in water

Subject: chemistry

• Accepts a proton in water
• Increases OH⁻ (hydroxide ion) concentration in water
• Donates an electron pair
• Increases H⁺ concentration in water

Explanation: • <b>Key Fact</b> The Arrhenius concept states that bases are substances that dissociate in water to yield hydroxyl ions (OH⁻). • <b>Supporting Detail</b> Conversely, an Arrhenius acid is a substance that increases the concentration of H⁺ (hydrogen ions) in water. • <b>Related Concept</b> Bronsted-Lowry theory defines bases as proton acceptors. • <b>Why wrong options are wrong</b> Lewis theory defines bases as electron pair donors, not Arrhenius. • <b>Exam Trick</b> Arrhenius relies on water (aqueous medium). H⁺ for acid, OH⁻ for base. • <b>Additional Info</b> Classic examples of Arrhenius bases include strong alkalies like NaOH and KOH.

Loading Gyaanify...