The common ion is chloride (Cl-).
The constant solubility product is modified.
lowering of solubility of the first solution when an another solution is added having the same ions is called common ion effect.
When a cooled saturated potassium nitrate solution is added to water, the concentration of the potassium nitrate decreases making it less likely that he substance will precipitate out of solution.
The solution is said to be saturated when it contains the maximum amount of solute that can dissolve in the solvent at a given temperature. If there is so much solute that no more will dissolve, the solution is supersaturated. This occurs when additional solute is added beyond the saturation point, leading to a temporary unstable state before the excess solute eventually precipitates out.
Solution provided the solution is not saturated.
The amount of solid needed to make a saturated solution is primarily affected by the solubility of the solute in the solvent, as well as the temperature of the solvent. Higher solubility and temperature generally require more solid to be added to reach saturation.
A saturated solution is made when you have added so much solute that no more dissolves. The amount of solute needed to make a saturated solution will change with the temperature of the solution.
The concentration of the salt solution does NOT change- it is saturated.
If more solute is added to the solution and the solute remains undissolved, then you know that solution is saturated.
NOTE: THIS IS NOT THE SAME AS SODIUM BICARBONATE! See the Related Questions for the solubility of baking soda.This is from the website linked to the left of this answer under Web Links: Solubility:45.5 g/100 ml water @ 100 °C (212 °F)Therefore, at that temperature (note that it is high!), in 1 liter, 455.0 grams of Na2CO3 will dissolve to make a saturated solution.
You would have a saturated solution because at that temperature and concentration, the amount of sodium chloride being dissolved is in equilibrium with the amount that can be dissolved. Any more added would exceed its solubility.
You can determine if the solution is saturated by adding a small amount of salt to the solution. If the salt dissolves, the solution is unsaturated. If the added salt does not dissolve and collects at the bottom of the container, the solution is saturated.