Bronsted-Lowry model

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10 Terms

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Bronsted-Lowry Model of acids and bases

Acids donate protons, while bases accept protons

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Amphoteric substances

A substance that can act as both an acid and a base

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Conjugate acids and bases

The compound formed in the products that is a result of the donation or acceptance of protons

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Chemical buffer

A chemical system that resists a change in pH by maintaining equilibrium

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Chemical buffers composition

Composed of conjugate acids/bases with a weak acid or base

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Chemical buffer’s reaction to addition of hydrogen ions

The hydrogen ions will react with the anion and shift equilibrium to the opposite side. However, the concentration of hydrogen ions does not change, therefore pH does not change

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Chemical buffer’s reaction to addition of hydroxide ions

The hydroxide ion will react with the cation and shift equilibrium to the opposite side of the reaction. However, the concentration of hydrogen ions does not change, therefore pH does not change

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Acid buffer equation

H2O + HA ←→ H3O+ + A-

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Basic buffer equation

B + H2O ←→ BH+ + OH-

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Assumption for dissociation of weak acids and bases

Can assume less than 1% dissociation