Saturated Solutions and Solubility Solubility refers to the

Saturated Solutions and Solubility

Solubility: refers to the mass (how much in grams) of solute that can dissolve in a given amount of solvent to form a saturated solution at a given temperature Example: at 0°C you can dissolve 35. 7 g of salt in 100 g of water

Solubility An “Unsaturated Solution” contains less solute than a saturated solution A “Saturated Solution” contains the maximum amount of solute that will dissolve in a solvent at a given temperature A “Supersaturated Solution” contains more solute than a saturated solution

Supersaturated Solutions You can make a supersaturated solution by making a saturated solution and then cooling that saturated solution without stirring it The excess solute will remain dissolved in the solution as long as it is not disrupted If you introduce any more solute the extra solute will become crystals

Supersaturated Solutions https: //www. youtube. com/watch? v=qcpi. DBya_Nw https: //www. youtube. com/watch? v=KFO 88 CMfa. FA

Solubility Curves We can graph and view how temperature increases the amount of solute that can be dissolved using a Solubility Curve

Solubility Curves The curved line represents the “SATURATION POINT” at a given temperature- or how many grams of solute dissolve in 100 g of solvent All amounts above the curved line would be “supersaturated” Any amount below the curved line means the solution is “unsaturated”

Factors Affecting Solubility Pressure Temperature – ↑ temperature of solvent= ↑ solubility of solid – For a few substances the reverse occurs – ↑ pressure of gas solute= ↑ solubility in liquid – Ex: high pressure of CO 2 in sealed pop bottle (supersaturated), opening bottle is like dropping crystal in, all the gas bubbles come out of the solvent

Solubility Graph Practice Try the worksheet “Saturation and Temperature” 1. Graph the data from the table on the solubility graph 2. Answer questions 1 -8 on a sheet of looseleaf

Solubility and Saturation. Simulation Lab http: //www. glencoe. com/sites/common_as sets/science/virtual_labs/PS 15. html Working in pairs, use a laptop to go to the following website to perform the virtual lab