Solutions and pH. A True Solution. A true solut ion is like a homogeneous mixture… two or more substances are mixed together evenly. A solvent is the substance that dissolves the other substance. A solute is the substance that is getting dissolved.
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A true solution is like a homogeneous mixture… two or more substances are mixed together evenly.
A solvent is the substance that dissolves the other substance.
A solute is the substance that is getting dissolved.
A common solution would be salt and water, where water is the solvent and salt is the solute.
Gases, liquids and solids can form different combinations.
Water molecules are polar – they have a negative and a positive end. Each end can them be attracted to certain solute particles. Water can dissolve most ionic solids by pulling the ions apart. Since fats and oils have few negative and positive ends they do not dissolve in water.
Some common solvents found in the home:
Nail polish remover
The ability of one substance to dissolve in another is called solubility.
Solubility varies depending on temperature.
For solids, an increase in temperature increases solubility.
For gases, an increase in temperature lowers solubility.
A saturated solution contains all the solute it can hold at a certain temperature and pressure.
An unsaturated solutions contains less solute than it can hold.
A supersaturated solution goes beyond the saturation point. It is created by heating and then cooling the solution. Crystals are made this way.
Particles settle out in a suspension; colloids have much smaller particles. The Tyndall Effect makes these smaller particles visible.