Alchemists developed the tools and techniques for working with chemicals.
Lavoisier helped to transform chemistry from a science of observation to the science of measurement that it is today.
Experiments scientific law
Depends on the amount of matter in a sample
Depends on the type of matter
Quality or condition of a substance that can be observed or measured without changing the substances composition.
States of matter
Def shape, def volume, not compressible
Indef shape, def volume, not compressible
Indef shape, indef volume, compressible
Plasma – does not occur naturally on earth.
1 phase salt/sugar water air Heterogeneous
Mixture where the composition is NOT uniform throughout.
Simplest form of matter
Formed from 2 or more atoms.
Most contain 2 or more elements.
Can be broken down into simpler substances.
The composition of matter always changes
Indications of a chemical reaction
Transfer of energy
Change in color
Production of gas
Formation of a precipitate
Conservation of mass
During any chemical reaction, the mass of the product is always equal to the mass of the reactants.
Mass is neither created nor destroyed.
In any physical change or chemical reaction, mass is conserved.