In the absence of stirring, the concentration of solute will be highest close to the pieces of solute, so more solute won't dissolve into the solution until the dissolved solute has been transported away by diffusion.
How does stirring affect the rate of solution formation? Chemistry Solutions Solution Formation. Doc Croc. Jun 9, Related questions How can temperature affect the formation of a solution? How can the formation of a solution be exothermic or endothermic? Skip to main content.
Search for:. Factors Affecting Solubility Solid Solubility and Temperature Solubility often depends on temperature; the solubility of many substances increases with increasing temperature.
Learning Objectives Recall the relationship between solubility and temperature. Key Takeaways Key Points 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 increased vibration kinetic energy of the solute molecules causes them to dissolve more readily because they are less able to hold together.
Key Terms solubility : The amount of a substance that will dissolve in a given amount of a solvent to give a saturated solution under specified conditions. Gas Solubility and Temperature Solubility of a gas in water tends to decrease with increasing temperature, and solubility of a gas in an organic solvent tends to increase with increasing temperature.
Learning Objectives Recall the relationship between gas solubility and temperature. Key Takeaways Key Points Gases dissolved in water become less soluble with increasing temperature. Gases dissolved in organic solvents become more soluble with increasing temperature.
Dissolved oxygen in water is important to the survival of fish, so increasing temperature and therefore less dissolved oxygen in water can cause problems for fish. Solubility and Pressure Increasing pressure will increase the solubility of a gas in a solvent.
Learning Objectives Recognize the relationship between pressure and the solubility of a gas. Key Takeaways Key Points For condensed phases solids and liquids , the pressure dependence of solubility is typically weak and is usually neglected in practice. The increase in solubility based on pressure will depend on which gas is being dissolved and must be determined experimentally for each gas. Licenses and Attributions.
CC licensed content, Shared previously. The rate of dissolution would be increased by stirring, or agitating the solution. Finally, the sugar would dissolve faster in hot tea than it would in cold tea. The rate at which a solute dissolves depends upon the size of the solute particles. Dissolution is a surface phenomenon, since it depends on solvent molecules colliding with the outer surface of the solute.
A given quantity of solute dissolves faster when it is ground into small particles, rather than in the form of large pieces, because more surface area is exposed. A packet of granulated sugar exposes far more surface area to the solvent and dissolves more quickly than a sugar cube.
Dissolving sugar in water will occur more quickly if the water is stirred. The stirring allows fresh solvent molecules to continually be in contact with the solute. If it is not stirred, then the water right at the surface of the solute becomes saturated with dissolved sugar molecules, meaning that it is more difficult for additional solute to dissolve.
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