Multiple Choice
Predict the direction of the following reaction:
HC2H3O2 (aq) + H2O (liq) ______________ H3O+ (aq) + C2H3O2– (aq)
14. Acids and Bases
Acid and Base Strength
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is the strongest base?
A
NO3–
B
F–
C
Cl–
D
ClO4–
E
H2O
Verified step by step guidance1
Identify the concept of basicity: A base is a substance that can accept protons (H+ ions) or donate a pair of valence electrons to form a bond. The strength of a base is determined by its ability to accept protons.
Consider the conjugate acid-base pairs: The strength of a base is inversely related to the strength of its conjugate acid. A weaker conjugate acid means a stronger base.
Analyze the given ions: NO3–, F–, Cl–, ClO4–, and H2O. Determine the conjugate acids for each: HNO3, HF, HCl, HClO4, and H3O+ respectively.
Compare the acid strengths: HNO3, HCl, and HClO4 are strong acids, meaning their conjugate bases (NO3–, Cl–, ClO4–) are weak. HF is a weak acid, making F– a relatively stronger base. H2O is neutral, acting as a very weak base.
Conclude the strongest base: Since HF is the weakest acid among the conjugate acids, F– is the strongest base among the given options.
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