Stirring affects the rate of dissolving because it spreads the solvent's molecules around the solute and increases the chance of them coming into contact with it. Because of this, stirring makes solvents dissolve faster. Other factors affecting a solvent's solubility include temperature and particle size.Know More
When performing a solubility experiment, using a stirring stick to move the solvent around the solute causes fresh portions of the solvent to come into contact with the liquid, which in turn makes it dissolve faster. There are other factors that affect a solvent's solubility as well:
Liquids act on the solvent's surfaceThe smaller the surface area is, the easier it is to dissolve. Therefore, grinding a substance down into smaller particles makes it easier to dissolve.
Heating the solution causes the solvent to dissolve fasterHowever, gasses become less soluble when the temperature increases. If a solvent is endothermic, it dissolves even faster under the pressure of temperature.
Applying pressure to a gas makes it more solubleHowever, it does not have much of an impact on liquids or solids.
The nature of forces between molecules influences solubilityIn order for the solvent to dissolve, the solute must be capable of breaking its hydrogen bonds, or its dispersion forces if the solvent is nonpolar. Learn more about Solutions & Mixtures
Factors that may affect the dissolving process include stirring the solution, increasing the temperature, increasing the pressure and having a smaller crystal size. These factors may have an effect on both the solubility of a solid and the rate of dissolution.Full Answer >
Molarity is an unit for expressing the concentration of a solute in a solution, and it is calculated by dividing the moles of solute by the liters of solution. Written in equation form, molarity = moles of solute / liters of solution.Full Answer >
Unsaturated solutions are solutions that contain less solute than the actual amount of solute that the solvent can dissolve. If more solutes can be dissolved in the solution, the solution is still considered unsaturated. Every solute and solvent combination has its limit, and once this limit is reached, the substance is in a state that is called the saturation point.Full Answer >
Chemists calculate the normality of a solution by dividing the gram equivalent weight of the solute by the volume of the solution in liters, explains About.com. They calculate the equivalent weight by dividing the molecular weight by the number of positive or negative charges the substance provides through dissolution.Full Answer >