a) Select all of the correct statements about the relative acid strengths of pai

Question

a) Select all of the correct statements about the relative acid strengths of pairs of acids from the choices below. HCl is a stronger acid than H2S because Cl is more electronegative than S. H2S is a stronger acid than H2O because S atoms are larger than O atoms. HCl is a stronger acid than HI because Cl is more electronegative than I. PH3 is a stronger acid than H2S because P is larger than S. HPO42- is a stronger acid than H2PO4- because it has more charge (is more unstable). HClO4 is a stronger acid than HClO3 because it has more oxygens around its central atom.

Explanation / Answer

HCl is a stronger acid than H2S because Cl is more electronegative than S. H2S is a stronger acid than H2O because S atoms are larger than O atoms. HCl is a stronger acid than HI because Cl is more electronegative than I. HPO42- is a stronger acid than H2PO4- because it has more charge (is more unstable).

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