Which solids will dissolve? Dayna Lee Martínez STARS – USF Maniscalco Elementary

Review Mixture –A mixture is a combination of two or more substances that are not chemically combined and that can be separated. –Could you give me an example? Homogeneous vs. heterogeneous mixtures –Homogeneous mixtures are of uniform appearance –Heterogeneous mixtures consists of visibly different substances

Solutions Solution –A solution is a group of molecules that are mixed up in a completely even distribution. AlloysCarbonated water Chocolate milk

Solute and Solvent Solute –A solute is the substance to be dissolved. Solvent –A solvent is the substance doing the dissolving.

Solubility –Ability of the solvent to dissolve the solute. Factors that affect solubility TemperaturePressure Structure of the substance

Classification of solutions Saturated solutions –have the maximum amount of solute dissolved in them. No more solute can be made to dissolve. Unsaturated solutions –have less than the maximum amount of solute dissolved in them. This means that more solute could be added to the solution and the additional solute would still dissolve. Supersaturated solutions –have more than the maximum amount of solute dissolved in them. Not all substances will form supersaturated solutions.

Saturated Unsaturated Supersaturated

Suspensions The particles in suspensions are larger than those found in solutions. Components of a suspension can be evenly distributed by mechanical means, like by shaking the contents, but the components will settle out. Chalk in water Dust in air

Which solids will dissolve? At the end of today’s experiment we will be able to answer this question for the following solids: sand, sugar, salt and baking soda