Open Question
Using TABLE 10.3, identify the stronger acid in each of the following pairs:a. HBr or HNO₂
10. Acids and Bases
Acid and Base Strength
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Which of the following bases will have the weakest conjugate acid?
A
CH3COOH
B
KOCH3
C
CH3NH2
D
NH4OH
E
LiOH
Verified step by step guidance1
Understand the concept of conjugate acids and bases: A conjugate acid is formed when a base gains a proton (H⁺). The strength of a conjugate acid is inversely related to the strength of its base; a strong base will have a weak conjugate acid.
Identify the bases given in the problem: CH₃COOH, KOCH₃, CH₃NH₂, NH₄OH, and LiOH. Note that CH₃COOH is actually an acid, not a base.
Consider the strength of each base: Strong bases tend to dissociate completely in water, while weak bases do not. LiOH is a strong base, while NH₄OH is a weak base.
Determine the relationship between base strength and conjugate acid strength: Since LiOH is a strong base, its conjugate acid (Li⁺) will be weak. Conversely, NH₄OH is a weak base, so its conjugate acid (NH₄⁺) will be relatively stronger.
Conclude that the base with the weakest conjugate acid is LiOH, as strong bases have weak conjugate acids.
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