Vocabulary
Density
What is mass/volume?
(or the ability to float or sink)
Reactant
Elements before the reaction has taken place
Solubility
What is the ability to dissolve?
List 3 Chemical Properties
Flammability, Reactivity, Oxidation, Corrosion, Radioactivity, Toxicity, Combustion, pH
States of Matter
Solid
Liquid
Gas
Heat Energy
What is Thermal Energy?
Products
the end result of the reaction or what is left after the reaction
Qualitative Properties
Observable properties
Is whether a substance burns when oxygen is present a chemical or physical property?
What is a Chemical Property
they speed up or slow down
Heat that is absorbed
What is Endothermic?
How many ATOMS of HYDROGEN are in the REACTANT?
2H2 + 02 = 2H20
What is 4?
If a spoonful of salt dissolves in water, how can you prove it has gone through a physical change and not a chemical change?
Water and salt can be separated through evaporation
How do you know when a chemical reaction has happened?
When a new substance has formed
When a change of state happens, what happens to the energy?
Thermal energy is added or subtracted.
Heat that is released
What is Exothermic
How many ATOMS are in the PRODUCT?
2H2 + 02 = 2H20
What is 6?
Quantitative Properties
Measurable properties
Which of the following is a chemical reaction:
Hydrogen and oxygen combine to form water
Liquid water freezes and becomes ice
A rock is crushed into small pieces
Sugar dissolves in ice
Hydrogen and oxygen combine to form water
Change from a Gas to Solid
Law of Conservation of Mass
Mass is not created or destroyed. Mass is conserved during a reaction.
What is the Chemical Formula for Photosynthesis?
CO2 + H2O + Light = O2 + C6H12O6
List 5 Physical Properties
Density, Color, Mass, Volume, Solubility, Hardness, Luster, etc
Reacts to oxygen and water to form rust
Change of State from Solid to Gas