Select all of the correct statements about the relative acid strengths of pairs

Question

Select all of the correct statements about the relative acid strengths of pairs of acids from the choices below.

a.) HCl is a stronger acid than H2S because Cl is more electronegative than S.

b.) H2SeO4 is a stronger acid than H2SO4 because Se is larger than S.

c.) HF is a stronger acid than H2O because F is more electronegative than O.

d.) H3AsO4 is a stronger acid than H3PO4 because As is larger than P.

e.) H2S is a stronger acid than PH3 because S is more electronegative than P.

f.) H2SeO4 is a stronger acid than HClO4 because Se is larger than Cl.

Explanation / Answer

a.) HCl is a stronger acid than H2S because Cl is more electronegative than S. = True

b.) H2SeO4 is a stronger acid than H2SO4 because Se is larger than S.= True (Greater the bond length , stronger is the acid)

c.) HF is a stronger acid than H2O because F is more electronegative than O.= True

d.) H3AsO4 is a stronger acid than H3PO4 because As is larger than P. = True (Greater the bond length , stronger is the acid)

e.) H2S is a stronger acid than PH3 because S is more electronegative than P. = False

f.) H2SeO4 is a stronger acid than HClO4 because Se is larger than Cl.= True (Greater the bond length , stronger is the acid)

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