Balancing Equations
What does the law of conservation of mass state? How does it apply to chemical reactions
Matter cannot be created or destroyed. The products must equal the reactants
4P + 5O2 -> 2P2O5
Synthesis
T or F: Oxidation and reduction can occur independently of each other. Explain why or no points!
False! If an element is reduced or oxidized the electrons need to travel somewhere. Therefore another element will need to do the opposite process
Which is more reactive
K or Ag?
K
Aqueous Solution- Dissolved in water
What are the products in P + O2 → P2O5
P2O5
2HCl + Mg -> MgCl2 + H2
Single Replacement
Mg + O2 -> MgO
Mg- Oxidized
O- Reduced
What will happen if a more reactive metal is added to a chemical reaction
it will replace the less reactive chemical
When two aqueous chemicals are mixed and a solid forms, what is this solid called
precipitate
How many oxygen atoms are on the left side of the following chemical equation?
Pb(NO3)2 + 2NaOH -> Pb(OH)2 + 2NaNO3
8
Combustion
What is the oxidation number for Aluminum in the following chemical
Al2O3
Al- 3+
Will a reaction occur?
Al (s) + CuCl2 (aq)
Yes
When balancing chemical equations, what is the only number that you can change
coefficient
The equation for the synthesis of carbon tetrachloride is shown below.
CH4(g) + Cl2 (g) -> CCl4 (l) + HCl (g)
What is the correct balanced equation
CH4 (g) + 4Cl2 (g) -> CCl4 (l) + 4HCl (g)
Double Replacement
Which substance is the oxidizing agent in the following reaction?
2CuSO4 + 4KI -> 2CuI + I2 + 2K2SO4
Cu (Copper)
Goes from 2+ to 1+ meaning it gained electrons and was reduced
Determine if a reaction will occur and write the balanced chemical formula
Ni (s) + MgCl2 ->
No reaction will occur
Why is leadvilles eastside so toxic (What is it called)? What two ingredients are required for Iron Sulfide (FeS2) to produce the toxin sulfuric acid (H2SO4)?
Hint: Look at the chemical equations
Acid metal drainage
Oxygen and Hydrogen
__C2H6 + __O2 -> __CO2 + __H2O
2C2H6 + 7O2 -> 4CO2 + 6H2O
CH4 + O2 -> C + 2H2O
Incomplete combustion
When exposed to oxygen gas (O2), calcium (Ca) undergoes a synthesis reaction.
1) Write and balance the chemical formula
2) Identify the charges of each element
3) Identify which elements are reduced and oxidized
2Ca + O2 -> 2CaO
Ca (0 -> +2) Oxidized
O (0 -> -2) Reduced
Determine if a reaction will occur and write the balanced chemical formula
Mg + AgNO3
Mg + AgNO3 -> Mg(NO3)2+2Ag
Name the 5 different types of reactions and their associated equations (A+B...)
synthesis (A + B ->AB), decomposition (AB-> A+B), single replacement (A+BC -> AC+B), double replacement (AB+CD -> AD+BC), combustion (CxHy+O2-> CO2 + H2O)