Factors affecting solubility

For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

The solubility product is a kind of equilibrium constant and its value depends on temperature. Ksp usually increases with an increase in temperature due to increased solubility.

• Temperature. Basically, solubility increases with temperature.
• Polarity. In most cases solutes dissolve in solvents that have a similar polarity.
• Pressure. Solid and liquid solutes.
• Molecular size.
• Stirring increases the speed of dissolving.

If we heat the solvent, the average kinetic energies of its molecules increases. Hence, the solvent is able to dislodge more particles from the surface of the solute. Thus, increasing the temperature increases the solubilities of substances. For example, sugar and salt are more soluble in water at higher temperatures.

solubility of all three solutes increases as temperature increases. the solubility of potassium nitrate increases the most from approximately 30 g per 100 g water to over 200 g per 100 g water.

The heat of solution of NaCl is very small as the heat of ionization is nearly equal to the heat of hydration. Therefore, temperature doesn’t affect the dissolution of NaCl as the heat of hydration almost equalizes heat of dissolution.

Notice how the temperature dependence of NaCl is fairly flat, meaning that an increase in temperature has relatively little effect on the solubility of NaCl. The curve for KNO3, on the other hand, is very steep and so an increase in temperature dramatically increases the solubility of KNO3 .

Increasing the temperature of a solution usually helps the solvent hold the solute so solubility increases. The effect of temperature on solubility may be graphed across a range of temperatures to create a solubility curve. In this lab, students will collectively create a solubility curve for KCl in water.

As you can see, at room temperature sodium chloride has a solubility of approximately 35 g/100 g H2O . As temperature increases, its solubility increases as well.

(a) When sodium chloride is dissolved in water, the process is endothermic in nature. This means that heat energy is absorbed in the process. Therefore, solubility increases with rise in the temperature. In case of lithium carbonate, the process of dissolution is exothermic.

Trace the solubility of a substance with increasing temperature.

1. The curved line represents saturation.
2. Below the curve, the solution is unsaturated.
3. Above the curve the solution is supersaturated. This means there is more solute than the solution can hold.

Answer. The solubility of common salt increases with rapid increase in temperature. Yes it is TRUE because due to increase in the temperature particles of water possesses high kinetic energy and move rapidly due to which space is get created for salt particles to get in the water.

Solubility of the most of the salt rises with increase in temperature. This is because with increase in temperature, kinetic energy of the molecules increases and the solvent molecules break apart the solute molecules that are held together by intermolecular attractions more effectively.