WHAT IS CHEMISTRY?
WHAT IS CHEMISTRY?
THE SCIENCE OF MATTER AND ITS
INTERACTIONS
IN A CHEMICAL REACTION, WHAT DO
YOU CALL THE SUBSTANCES THAT YOU
START WITH? THAT YOU END UP WITH?
IN A CHEMICAL REACTION, WHAT DO
YOU CALL THE SUBSTANCES THAT YOU
START WITH? THAT YOU END UP WITH?
THE REACTANTS
THE PRODUCTS
HOW DOES THE LAW OF CONSERVATION
OF MASS APPLY TO A CHEMICAL
REACTION?
HOW DOES THE LAW OF CONSERVATION
OF MASS APPLY TO A CHEMICAL
REACTION?
IN A CHEMICAL REACTION, MATTER IS
NEITHER CREATED OR DESTROYED. THE
ATOMS ARE SIMPLY REARRANGED.
BALANCE EACH EQUATION, AND IDENTIFY
ITS TYPE:
a.Hf + N2  Hf3N4
b.Mg + H2SO4  MgSO4 + H2
c.C2H6 + O2  CO2 + H2O
d.Pb(NO3)2 + NaI  PbI2 + NaNO3
e.Fe + O2  Fe2O3
BALANCE EACH EQUATION, AND IDENTIFY ITS
TYPE:
a.3Hf + 2N2  Hf3N4 SYNTHESIS
b.Mg + H2SO4  MgSO4 + 2H2 SINGLE DISPLACEMENT
c.2C2H6 + 7O2  4CO2 + 6H2O COMBUSTION
d.Pb(NO3)2 + 2NaI  PbI2 + 2NaNO3 DOUBLE DISPL.
e.4Fe + 3O2  2Fe2O3 SYNTHESIS
WHY DOES WATER HAVE SUCH UNUSUAL
PROPERTIES FOR A SUBSTANCE OF ITS
MOLECULAR MASS?
WHY DOES WATER HAVE SUCH UNUSUAL
PROPERTIES FOR A SUBSTANCE OF ITS
MOLECULAR MASS?
IT IS A POLAR COMPOUND
LIST 3 UNUSUAL PROPERTIES OF WATER.
LIST 3 UNUSUAL PROPERTIES OF WATER.
1) IT HAS A HIGH BOILING AND MELTING
POINT
2) IT HAS A HIGH HEAR OF FUSION AND
HEAT OF VAPORIZATION
3) THE SOLID IS LESS DENSE THAN THE
LIQUID
4) IT HAS A HIGH SURFACE TENSIION
5) IT IS A GOOD SOLVENT FOR IONIC AND
POLAR COMPOUNDS
WHAT IS A MOLE?
WHAT IS A MOLE?
6.023 X 1023
WHAT DOES ONE MOLE WEIGH?
WHAT DOES ONE MOLE WEIGH?
FOR ATOMS, THE ATOMIC MASS IN
GRAMS
FOR COMPOUNDS, THE FORMULA MASS IN
GRAMS