Partial and total concentration in solutions


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> The total pressure of gas mixture equals the sum of partial pressures of its components.
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Can this rule be true for liquid concentration?  

I.e. can we say: the total concentration of mixture is equal to the sum of partial concentrations of its components?




It's true and false.


For example: 
1 Solution with 1mol/L of NaCl and 1mol/L of KBr.
The total concentration of salts is 2mol/L.


But the ions concentration are:


Na+ 1mol/L
K+ 1mol/L
Cl- 1mol/L
Br- 1mol/L


Is it clear?


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