Question

how chlorine is more acidic
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Answer 1

Answer:

The first one is the electronegativity. ... That means Fluorine is the most electronegative and then chlorine, then bromine and iodine. That means the one with the chlorine is the stronger acid and the one with the bromine is the weaker acid when you compare the two.

Answer 2

Answer:

Chlorine gas is considered more acidic than the rest of the halogens.

Explanation:

According to the Lewis Acid definition of acid,

• A compound or ionic species which can accept an electron pair from a    donor compound, is a Lewis Acid.

So, Chlorine gas which is able to form Chloride anion (Cl⁻) by accepting is considered acidic.

• Since The Electronegativity of Chlorine is higher than the rest of the halogens,  it will accept electrons more readily/easily than the rest of them, hence it will be considered more acidic.

                               

Hope this helps !