Mole Review (I am going to cry)

Molar Mass = The mass of 1 mole of a substance

Molarity

• The concentration of a solution is a measure of the amount of solute that is dissolved in a given quantity of solvent.

  1. A dilute solution contains only a small amount of given solute.

  2. A concentrated solution contains a large amount of solute.

• Concentration can be measure in various ways. The most commonly used in chemistry is molarity. Molarity is measured in moles/litres. There are three accepted units.

  • M, mol/L

• Formula: M=moles/L

• Three possibiles calculations using the molarity formula:

  1. Given moles and volume, calculate molarity

  2. Given concentration and volume, calculate moles

  3. Given concentration and moles, calculate volume

Ionic Charge

• The charge an element has when it gains or loses electrons, becoming an ion.

• If the element has multiple ionic charges, you need to use basic algebra to solve which charge is involved in a compound.