Topic 1 - Stoichiometry
- Avogadro’s constant: The number of particles in 12g of 12C. 6.022 x 10^23
- Atomic mass: The mass of a single atom
- Chemical reaction: A reaction in which bonds in the reactants are broken and bonds in the products are formed resulting in an energy change between the reacting system and its surroundings.
- Compound: Two or more types of atoms chemically bonded together.
- Concentration: a measure of the amount of dissolved substance contained per unit of volume
- Element: A substance that contains only one type of atom.
- Excess: The reactant which there is more of than needed to react with all of the limiting reagent.
- Formula, empirical: The formula obtained by experiment, showing the simplest whole number ratio of atoms of each element in a particle of the substance.
- Formula mass: The mass of one formula unit of that substance
- Formula, structural: Shows the arrangement of atoms and bonds within a molecule.
- Ion: Charged particles.
- Limiting reagent: The reactant which will determine the theoretical maximum amount of product formed.
- Molar mass: The mass of a mole of a substance.
- Mole: The amount of substance that contains a number of specified species equal to Avogadro’s constant.
- Molecular mass: the mass of one molecule of that substance
- Solute: A substance that is dissolved into another ( the solvent)
- Solvent: a substane that dissolves another ( the solute)
- Yield, percentage: The experimental yield as a percentage of the maximum theoretical yield.
- Yield: The amount of product.