H 3 PO 4 is a stronger acid than H 3 AsO 4 .

H 3 is a sulfonic acid group, which is a stronger acid than the AsO group in H 3 AsO. This is because the sulfur atom is more electronegative than the arsenic atom, making the S-O bond more polar and easier to break, resulting in a more acidic compound.

H 3 PO 4 is a stronger acid than H 3 AsO 4 .

H 3 is a sulfonic acid group, which is a stronger acid than the AsO group in H 3 AsO. This is because the sulfur atom is more electronegative than the arsenic atom, making the S-O bond more polar and easier to break, resulting in a more acidic compound.