A solution is saturated in both nitrogen gas and sodium iodide at 50 degrees C . When the solution is cooled to 25 degrees C what is most likely to occur?
NaI will ppt. Gases are more soluble at lower temperatures. MOST, but not all, ionic solids are more soluble at higher T.
When a solution is saturated with a solute at a higher temperature, it means that the solution contains the maximum amount of that solute that can be dissolved at that particular temperature.
As the solution cools down, the solubility of most solutes decreases, which means that they can no longer stay dissolved in the same amounts as before. In the case of the nitrogen gas, it is less likely to be affected by the change in temperature because the solubility of gases generally decreases with decreasing temperature. Therefore, the nitrogen gas will most likely stay dissolved in the solution even when it is cooled.
However, sodium iodide is a solid compound, and its solubility generally increases with increasing temperature. So, when the solution is cooled from 50 degrees Celsius to 25 degrees Celsius, it is expected that the solubility of sodium iodide will decrease. This decrease in solubility may lead to the formation of solid sodium iodide crystals in the solution, as the solution becomes saturated and can no longer hold all the dissolved sodium iodide at the lower temperature.
In summary, when the solution is cooled to 25 degrees Celsius, it is most likely that solid sodium iodide crystals will form in the solution due to the decrease in solubility at lower temperatures.
To determine what is most likely to occur when a solution saturated in nitrogen gas and sodium iodide is cooled from 50 degrees C to 25 degrees C, we need to consider the solubility behavior of the components involved.
When the temperature of a solution decreases, the solubility of most solid solutes generally decreases. However, the solubility of gases tends to increase with decreasing temperature. In this case, the solubility of nitrogen gas is likely to increase as the solution is cooled.
On the other hand, sodium iodide is a solid compound, and its solubility in water generally decreases as the temperature decreases. As a result, when the solution is cooled, the solubility of sodium iodide is expected to decrease.
Based on this information, it is most likely that some of the excess nitrogen gas dissolved in the solution will come out of solution in the form of gas bubbles as the temperature decreases. At the same time, the solubility of sodium iodide may exceed its saturated concentration at the lower temperature, resulting in some of the solid precipitating out of the solution.
Therefore, the most likely occurrence when the solution is cooled from 50 degrees C to 25 degrees C is the release of nitrogen gas bubbles and the precipitation of sodium iodide crystals.