Hi everyone! So I have ZnBr2 and CdCl2, and I am asked to choose the most acidic one. Firstly, I do not understand why both salts are acidic.... If my ZnBr2 undergoes hydrolisis, the reaction is ZnBr2 + 2H2O <------> Zn(OH)2 + 2HBr. This would mean that this is acidic as the HBr dissociates completely. I was told that there is something about the size tend about the atoms. However, I do not understand how the size of the Zn or Cd matters in determining the acidity as the atoms will end up with the hydroxides as a base in the reaction... Please explain to me why one salt is more acidic than the other, and please explain why the size trend matters in this instance. I know that if I have an H-X acid, then the size of the X atom determines the acidity [the larger it gets, the weaker the bond, the more acidic]. However, my Zn and Cd are not attached in this instance. Thanks in advance.