Using the Acid Dissociation Constants for Glycine (K_a1 = 4

question 2

Multiple Choice

Using the acid dissociation constants for glycine (K_a1 = 4.6 × 10−³ and K_a2 = 2.5 × 10−¹⁰) ,calculate the [Z]/[A−] ratio at pH 7.00.(Z = Zwitterion,A− = deprotonated anion)

• A) 2.2 × 10−⁵
• B) 2.5 × 10−³
• C) 4.0 × 10²
• D) 4.6 × 10⁴
• E) 1.8 × 10⁷

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