VOCAB
A list that ranks the reactivity of metals (and nonmetals)
the activity series
CH4 + O2 --> CO2 + H2O
Combustion (C)
What law is the reason we balance chemical equations?
Law of Conservation of Mass
C3H8 + O2 -->
CO2 + H2O
What are the 4 kinds of evidence when chemical reactions occur?
light, heat, gas, precipitate
What are the reactants in the equation:
FeS + 2HCl --> H2S + FeCl2
FeS and HCl
Synthesis (S)
__Li2O --> __Li + __O2
2Li2O --> 4Li + O2
Ca + O2 -->
CaO
What does a triangle represent in an equation?
Heat
If a metal "oxidizes," what is happening to it?
It's rusting!
H2SO4 --> SO3 + H2O
Decomposition (D)
Al + Br2 --> AlBr3
2Al + 3Br2 --> 2AlBr3
NaClO3 -->
NaCl + O2
What is the most reactive metal? What is the most reactive nonmetal?
A substance that is dissolved in water.
Aqueous (aq)
AgNO3 + NaCl --> NaNO3 + AgCl
Double Replacement (DR)
__HNO3 --> __H2O + __NO2 + __O2
4HNO3 --> 2H2O + 4NO2 + O2
Mg(OH)2 + HCl -->
MgCl2 + H2O
Any metal above hydrogen (H) on the activity series will react (dissolve) in ___ (what kind of substances?)
Acids - every acid contains H
A chemical that speeds up reactions.
catalyst
2KCl + F2 --> 2KF + Cl2
Single Replacement (SR)
Balance the combustion of heptane (hept = 7)
C7H16 + 11O2 --> 7CO2 + 8H2O
K + H2O -->
H2 + KOH
Which would you actually see in a chemical equation? 2H or H2? Why wouldn't you see the other?
H2 because H is a diatom. It is too reactive to be a single element so it MUST be bonded to another element