Repaso de tests charlie acidos y bases
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The Bronsted-Lowry Theory states that weak acids have strong conjugate bases and weak bases have strong conjugate acids. The weaker the acid or base, the stronger its conjugate partner. A weak acid is weak because its conjugate base is strong enough to reform the original acid, and similarly for weak bases and their conjugate acids. For example, NH3 is a weak base because its conjugate acid NH4+ is strong and readily gives up H+ to reform NH3.
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- Salts can be acidic or basic depending on whether their conjugate ion is from a weak acid or base.
- Buffer solutions resist changes in pH when acids or bases are added by using a weak acid and its conjugate base, or a weak base and its conjugate acid.
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Repaso de tests charlie acidos y bases
- 7. P.21
- 11. The Bronsted-Lowry Theory: T An important concept in Bronsted-Lowry Theory involves the relative strengths of acid-base pairs. a Weak acids have strong conjugate bases. a Weak bases have strong conjugate acids. a The weaker the acid or base, the stronger the conjugate partner. The reason why a weak acid is weak is because the conjugate base is so strong it reforms the original acid. i Similarly for weak bases. i Since NH3 is a weak base, NH4+ must be a strong acid. NH4+ gives up H+ to reform NH3. . Compare that to NaOH→ Na+(aq) + OH-(aq) Na+ must be a weak acid or it would recombine to form NaOH Remember NaOH ionizes 100%. NaOH is a strong base.