Solutions

What is a solution? Usually a Homogeneous Mixture of two or more substances in a physical state Made of two parts Solute: part being dissolved Solvent: part that does the dissolving

Example of a solution Salt + water → saltwater Which is the solute? Which is the solvent? water

The solid that forms from a solution. What is a precipitate? The solid that forms from a solution.

What is an aqueous solution? A solution where the solvent is water

Can a Heterozygous Mixture form a solution? Yes, but it is usually considered a temporary solution Suspension: has different parts that settle to the bottom (Example dirt and water mixed)

What is a Colloid? A stable Heterozygous Mixture that forms a solution The particles don’t settle out Why? The particles are electrically charged and repel each other to form bigger particles Example: Milk

What is Solubility? The quantity of a solute that will dissolve in a specified amount of solvent at a specific temperature.

The ratio of a solute to solvent Example: 95% water to 5% salt What is Concentration? The ratio of a solute to solvent Example: 95% water to 5% salt

Concentration formulas M (Molarity)=mole of solute ٪ Liter of solution m (Molality)= mole of solute ٪ Kilograms of solution ppm (Parts per million) 1st step: grams of solute x1,000,000g of solution 2nd step: Divide answer by grams of solvent

Concentration formulas cont. Mole Fraction XA =nA ٪ nA +nB XB =nB ٪ nA +nB nA =number of moles of solvent nB =number of moles of solute

The End