Open Question
Based on their molecular structure, pick the stronger acid from each pair of oxyacids. Explain your choice for the following pairs: a. H2SO4 or H2SO3 b. HClO2 or HClO c. HClO or HBrO d. CCl3COOH or CH3COOH.
Ch.16 - Acids and Bases
Chapter 16, Problem 122
Which is a stronger base, PO4^3- or AsO4^3-? Explain.
Verified step by step guidance1
Consider the periodic trend of electronegativity: Electronegativity generally decreases as you move down a group in the periodic table.
Identify the position of phosphorus (P) and arsenic (As) in the periodic table: Phosphorus is above arsenic in Group 15.
Compare the electronegativity of phosphorus and arsenic: Phosphorus is more electronegative than arsenic.
Relate electronegativity to base strength: A more electronegative central atom will hold onto its electrons more tightly, making the conjugate base weaker.
Conclude which is the stronger base: Since arsenic is less electronegative than phosphorus, AsO4^3- is a stronger base than PO4^3-.
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