Explain why the acidity of halogens acids decrease in the order HI>HBr>HCl although their ionic characters increase in the reverse order.

Explain why the acidity of halogens acids decrease in the order HI>HBr>HCl although their ionic characters increase in the reverse order.

• The strengths of these acids decrease in the order HI > HBr > HCl:  due to the decrease in the H-X bond energy in the order HCl > HBr > HI.
• the ionic character increase in order HI < HBr < HCl because the electronegativity of the halogen atom increase in order I< Br < Cl.

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