The volume of a solution at equilibrium

In summary, equilibrium in a solution refers to a state where the concentration of reactants and products remain constant, and the volume of a solution can affect the equilibrium position but not the equilibrium constant. The concentration of reactants and products at equilibrium is directly related to the volume of a solution, and the volume of a solution at equilibrium can be changed by adding or removing solutes or solvents. The volume of a solution at equilibrium can be calculated using the ideal gas law.
  • #1
Entanglement
439
13
Say that we have a salt solution does the volume of the solution change after when the salt is ionized and equilibrium is achieved ??
 
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  • #2
I think what you're asking is whether Vol(salt) + Vol(water) = Vol(solution). The answer is no.

For sodium chloride and water, Vol(solution) < Vol(salt) + Vol(water). For other salts (e.g. lithium iodide) the opposite can occur. This absurdly long paper (it's paywalled, so go to a university library if you want to read it) gives data for the alkali metal halides.
 

1. What is the definition of equilibrium in a solution?

Equilibrium in a solution refers to a state where the concentration of reactants and products remain constant, meaning that the forward and reverse reactions are occurring at the same rate.

2. How is the volume of a solution related to equilibrium?

The volume of a solution can affect the equilibrium position, but not the equilibrium constant. Increasing the volume of a solution decreases the concentration of the solutes, which can shift the equilibrium towards the side with more moles of gas.

3. How does the concentration of reactants and products affect the volume of a solution at equilibrium?

The concentration of reactants and products at equilibrium is directly related to the volume of a solution. If the concentration of one of the species is increased, the volume of the solution will also increase to maintain the same equilibrium constant.

4. Can the volume of a solution at equilibrium be changed?

Yes, the volume of a solution at equilibrium can be changed by adding or removing solutes or solvents. This will cause a shift in the equilibrium position, but the equilibrium constant will remain the same.

5. How can you calculate the volume of a solution at equilibrium?

The volume of a solution at equilibrium can be calculated using the ideal gas law, where V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin. V = nRT/P, where P is the pressure of the solution.

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