which is the stronger acid, HIO4 or HBrO4?
HBrO4 is more stronger than HIO4,because Br is more electronegative than I...
To determine which acid is stronger between HIO4 (periodic acid) and HBrO4 (perbromic acid), we can compare the acidity of their conjugate bases IO4- (periodate ion) and BrO4- (perbromate ion). The stronger acid will have a more stable conjugate base.
In general, the acidity of oxyacids (acids with oxygen) increases with the increasing electronegativity of the central atom. Bromine (Br) is more electronegative than iodine (I), which means that HBrO4 is more acidic than HIO4.
Therefore, HBrO4 is the stronger acid compared to HIO4.
To determine which acid is stronger, we need to compare their acid dissociation constants (Ka) or their pKa values. The stronger the acid, the larger the Ka or the smaller the pKa.
In this case, we are comparing HIO4 (periodic acid) and HBrO4 (perbromic acid). The acid dissociation constants for these two acids are not readily available. However, we can use the periodic trends and knowledge of electronegativity to make an estimation.
Since iodine (I) is less electronegative than bromine (Br), we can infer that the O-I bond in HIO4 is weaker or more prone to dissociation than the O-Br bond in HBrO4. Therefore, HIO4 is expected to be a stronger acid than HBrO4.
Please note that this estimation is based on general trends and should be confirmed using experimental data or actual acid dissociation constants whenever possible.
These follow the same trend as the "hydro" acids.
HF < HCl < HBr < HI
HClO4 < HBrO4 < HIO4