Chemical Changes Flashcards
Physical Properties
Properties that can be observed by your 5 senses.
Chemical Properties
Properties that describe how a substance combines with other substances to form new chemicals.
Flammability
An indicator of how easily something (substance) burns.
Reactivity
A measure of how likely a metal’s element replaces an element in a compound.
Toxicity
Danger to one’s health caused when poisonous substances combine with chemicals in your body, therefore creating new toxic substances with damaging effects.
Chemical Changes
Change that ends up with a new substance being formed, during this some chemical bonds break and others form.
Evaporates
Changes state from liquid to gas.
State
The condition or phase of the substance.
Physical Changes
Change in which NO new chemical substances are formed. A physical change may be a change in shape, size or state. Many physical changes are easy to reverse.
Chemical reaction
A chemical change in which one or more substances are produced.
Reactants
A chemical substance used up in a chemical reaction. Some chemical bonds in a reactant are broken during the reaction.
Products
A new chemical substance that results from a chemical change.
Precipitate
Solid product of a chemical reaction that doesn’t dissolve in water
Reaction rate
The speed at which a reaction takes place
Catalyst
Is a chemical that can speed up a chemical reaction but is still present once the reaction has finished.
