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a) H2SO4 and H2Se04 The acidity of the oxyacid depends on the electronegativity of the central atom. As the electronegativity increases, the -O-H bond will be weaken and thus increases the acidity. Between S and Se, S is more electronegative atom and thus H2SO4 is more acidic than H2Se04 H2SO4 H2SeO4 b) H3PO4 and H3ASO4 The acidity of the oxyacid depends on the electronegativity of the central atom. As the electronegativity increases, the -O-H bond will be weaken and thus increases the acidity. Between P and As, P is more electronegative atom and thus H3PO4 is more acidic than H3ASO4 H3PO4 H3ASO4
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