Combustion
What are the reactants of a chemical combustion?
Carbon
Hydrogen
Oxygen (O2)
What is a precipitate?
An insoluble solid compound
What must you use to determine if a compound is soluble or insoluble?
The chart given
What are the products of chemical combustion?
Carbon Dioxide
Water
Identify the precipitate in the equation below
BeH(aq)+ BeCl(aq) --> BeCl(s)+ VH(aq)
BeCl because it has the notation (s)
If a compound is identified as (aq), what does it mean?
It is soluble
Why is oxygen written as O2 in the chemical combustion products?
It is a diatomic!
What are spectator ions?
The ions that do not participate in a reaction (disassociated with the equation)
Name one element that is always soluble, WITH NO EXCEPTIONS
Na+, Li+, K+, Rb+, Cs+
Chemical equations are always...
BALANCED
What is the net ionic equation?
The equation for ONLY the precipitate and its elements
A soluble compound is strong or weak electroylte?
STRONG
To find empirical formula of C and H, what are the three main steps?
Given: g CO2
Given: g H2O
1. convert g Co2 to moles of C
2. convert g H2O to moles of H
3. divide by smallest mole
How do we determine the net ionic equation?
2. balance the equation
3. determine the solubility
4. write each element out and cancel to determine spectator ions
5. write what remains for net equation
The molecules are surrounded by ____ water
polar