Bronsted Acids Strength

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JTieu_1L
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Bronsted Acids Strength

Postby JTieu_1L » Thu Dec 03, 2020 11:24 am

Why is it that with longer bond from Br in Hydrobromic acid makes it stronger compared to HCl? I thought that with longer bond length, the atoms would not be closer to each other and therefore not as strong.

John Pham 3L
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Re: Bronsted Acids Strength

Postby John Pham 3L » Thu Dec 03, 2020 11:29 am

HBr is a stronger acid since it is more likely to give its proton compared to HCl.
The longer bond length means weaker bond strength of HBr than HCl.

Audra Mcleod 3G
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Re: Bronsted Acids Strength

Postby Audra Mcleod 3G » Thu Dec 03, 2020 11:33 am

Hello!
An acid's strength is determined by the extent to which it ionizes in a solution, and in order to ionize the acid must dissociate into ions. Since this would require the bonds between the atoms in the acid to break, then acids consisting of weaker bonds will be considered stronger as they will more easily ionize. Therefore, HBr is regarded as a stronger acid since the size of Br will result in longer/weaker bonds.

Crystal Pan 2G
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Re: Bronsted Acids Strength

Postby Crystal Pan 2G » Thu Dec 03, 2020 12:29 pm

A strong acid(or even base) is almost completely ionized/dissociated in solution. The longer the bond, the more easily the acid dissociates, which is why HBr would be a stronger acid than HCl


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