Which member of each pair produces the more acidic aqueous solution? Match the words in the left column to the appropriate blanks in the sentences on the right. ResetHelp When comparing Ca(NO3)2 or NiBr2, the one that produces a more acidic aqueous solution is NiBr2 N i B r 2 When comparing C a ( N O 3 ) 2 or N i B r 2 , the one that produces a more acidic aqueous solution is blank.. When comparing ZnBr2 and CdCl2, the one that produces a more acidic aqueous solution is When comparing Z n B r 2 and C d C l 2 , the one that produces a more acidic aqueous solution is blank.. When comparing CuCl or Cu(NO3)2, the one that produces a more acidic aqueous solution is When comparing C u C l or C u ( N O 3 ) 2 , the one that produces a more acidic aqueous solution is blank..

Explanation:

Ionjc equation

ZnCl2 --> Zn2+ + 2Cl-

CdCl2 --> Cd2+ + 2Cl-

Both Cd2+ and Zn2+ have the same number of charge so lewis acid does not apply. Zn2+ has a smaller radius than Cd2+ hence it will produce a more acidic solution.

Ionic equation

Ca(NO3)2 --> Ca2+ + 2NO3^-

NiBr2 --> Ni2+ + 2Br-

Both Ni2+ and Ca2+ have the same number of charge so lewis acid does not apply. Ni2+ has a smaller radius than Ca2+ hence it will produce a more acidic solution.

Ionic equation

CuCl --> Cu+ + Cl-

Cu(NO3)2 --> Cu2+ + 2NO3^-

The hardness of a lewis acid increases with increasing positive charge, as the electron density is more concentrated. Therefore, Cu2+ is the stonger acid in solution than Cu+, being less polarizable that is the strength to pull electrons in Cu2+ is stronger.

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