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according to pKa strength Hydrogen Fluoride is the weakest (about + 3.5 pKa)

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Deffrence between halogen acid and hydrogen halide?

Halogen acids typically refer to binary acids containing a halogen atom and hydrogen, such as hydrochloric acid (HCl) or hydrofluoric acid (HF). Hydrogen halides specifically refer to covalent compounds consisting of hydrogen and a halogen element, such as hydrogen chloride (HCl) or hydrogen fluoride (HF). Essentially, all hydrogen halides are halogen acids but not all halogen acids are hydrogen halides.


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A weak acid is one where the acid only liberates a little number of hydrogen ions (H+) in water. Therefore, they are weak electrolytes. Compare this to a strong acid, which liberates a lot more hydrogen ions when dissolved in water.


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