Acid / Base Neutralization

 

STRONG ACID / STRONG BASE


HCl(aq)   +   NaOH(aq)   ---------->   HOH(l)   +   NaCl(aq)   (complete formula eqn.)

H+(aq)   +   Cl-(aq)   +   Na+(aq)   +   OH-(aq)   ---------->   HOH(l)   +   Na+(aq)   +   Cl-(aq)   (ionic eqn.)

H+(aq)   +   OH-(aq)   ---------->   HOH(l)   (net ionic eqn.)

The salt in this neutralization (NaCl) is neutral.
 

weak acid / STRONG BASE


HC2H3O2(aq)   +   NaOH(aq)   ---------->   HOH(l)   +   NaC2H3O2(aq)   (complete formula eqn.)

HC2H3O2(aq)   +   Na+(aq)   +   OH-(aq)   ---------->   HOH(l)   +   Na+(aq)   +   C2H3O2-(aq)   (ionic eqn.)

HC2H3O2(aq)   +   OH-(aq)   ---------->   HOH(l)   +   C2H3O2(aq)   (net ionic eqn.)

The salt in this neutralization (NaC2H3O2) is basic.
 

STRONG ACID / weak base

HCl(aq)   +   NH3(aq)   ---------->   NH4Cl(aq)   (complete formula eqn.)

H+(aq)   +   Cl-(aq)   +   NH3(aq)   ---------->   NH4+(aq)   +   Cl-(aq)   (ionic eqn.)

H+(aq)   +   NH3(aq)   ---------->   NH4+(aq)   (net ionic eqn.)

The salt in this neutralization is acidic.
 

weak acid / weak base

HC2H3O2(aq)   +   NH3(aq)   ---------->   NH4C2H3O2(aq)   (complete formula eqn.)

HC2H3O2(aq)   +   NH3(aq)   ---------->   NH4+(aq)   +   C2H3O2-(aq)   (ionic eqn.)

HC2H3O2(aq)   +   NH3(aq)   ---------->   NH4+(aq)   +   C2H3O2-(aq)   (net ionic eqn.)

The acid / base properties of the salt (NH4C2H3O2) can not be determined without quantitative data regarding the strengths of HC2H3O2 and NH3.