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Chemical Reaction
Matter changes from one compound to another with different properties.
Physical Reaction
Matter changes its appearance but does not change on a molecular level.
Biochemical Reaction
A chemical change that happens in a cell.
Reactant
Chemical(s) before a reaction takes place.
Product
Chemical(s) after a reaction takes place.
Law of Conservation of Mass
Matter cannot be created or destroyed.
Density
The amount of mass per volume of a substance (unit = g/mL or g/cm^3).
Viscosity
The ability of a liquid substance to flow, can be high or low.
Solid
Molecules held together in a fixed pattern.
Liquid
Molecules that are close together but free to move.
Gas
Molecules that are widely separated.
Solute
The substance being dissolved in a solution.
Solvent
The substance doing the dissolving in a solution.
Aqueous Solution
When water is the solvent.
pH
Potential hydrogen, acids and bases.
Acid
When the ratio of H+ is greater than OH- in an aqueous solution.
Base
When the ratio of OH- is greater than H+ in an aqueous solution.
Decomposition
Breakdown of larger molecules into its parts.
Synthesis
Combination of smaller molecules into a larger.
Single Replacement
One molecule remains and another is recombined.
Double Replacement
Both molecules rearrange and swap components.
Note
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