Chapter 4- Compounds and Stoichiometry Flashcards
Molecular weight
Is the mass (amu) of the constituent atoms in a compound as indicated by the molecular formula.
Molar mass
Mass of one Mike of a compound. Usually measured in g/mol.
Gram equivalent weight
Is a measure of the mass of a substance that can donate one equivalent of the species of interest.
=molar mass/n
n= species of interest
Normality
Is the ratio of
equivalents/L
Molarity
=N/n
Equivalents
Are miles of the species of interest.
= mass of compound/gram equivalent weight
Law of composition
States that any pure sample of a compound will contain the same elements in the same mass ratio.
Empirical formula
Smallest whole number ratio of the elements in a compound.
Molecular formula
Exact number of atoms in each element in a compound.
% composition
Mass of formula element/molar mass.
Combination reaction
Occur when two or more reactions combine to form one product.
Decomposition reactions
Occur when one reactant is chemically broken down into two or more products.
Combustion reactions
Occur when a fuel and oxygen react to form in the product water and carbon dioxide.
Fuel is generally a hydrocarbon.
Displacement reactions
Occurs when one or more atoms or ions of one compound are replaced with one or more atoms or ions of another compound.
Single and double.
Neutralization reactions
Acid base reaction which forms a salt.
