Stoichiometry & Chemical Reactions
7 terms
Percentage Purity
Stoichiometry & Chemical Reactions
Dimensionless
The proportion of a sample that consists of the desired compound, expressed as a percentage of the total mass.
% purity = (mass pure / mass sample) × 100
Percentage Yield
Stoichiometry & Chemical Reactions
Dimensionless
The actual yield expressed as a percentage of the theoretical yield.
% yield = (actual / theoretical) × 100
Photochemical Reaction
Stoichiometry & Chemical Reactions
nm
A reaction initiated by the absorption of light, which promotes a molecule to an electronically excited state.
A + hν → A*
Precipitate
Stoichiometry & Chemical Reactions
g
An insoluble solid that separates from a solution as the result of a chemical reaction.
Precipitation Reaction
Stoichiometry & Chemical Reactions
Dimensionless
A reaction in which two solutions combine to form an insoluble solid that separates from the mixture.
A⁺(aq) + B⁻(aq) → AB(s)
Product
Stoichiometry & Chemical Reactions
mol
A substance formed as a result of a chemical reaction.
Pyrolysis
Stoichiometry & Chemical Reactions
°C
The thermal decomposition of a substance at high temperature in the absence of oxygen.
complex → simpler fragments (Δ, no O₂)