Chemical Equations
Balancing Chemical Equations
Conservation of Mass
Mole to mole Factors
Miscellaneous
100
What do the coefficients in a balanced equation tell us?
the number of moles or molecules present for each substance in a reaction
100
In order to balance a chemical equation, you must change the ________________
__Fe2O3(s) + __C(s) → __CO2(g)+ __Fe(s)
Coefficients
100
How does the image show conservation of matter?
The product side contains the same number and type of atoms as the reactants side.
100
What is the term for the ratio between the coefficients of any two reactants or products in a balanced chemical equation?
mole - mole ratio
4Na(s) + O2 (g) → 2 Na2O(s)
100
What is the conversion factor needed to convert the number of moles of H2O to the number of moles of NH3 produced?
Mg3N3 (s) + 6 H2O(l) → 3 Mg(OH)2 (s) + 2 NH3 (g)
200
What do the subscripts in a chemical reaction tell us?
The number of atoms of each element within a substance
200
When balancing an equation, you need the same number of atoms on the ____________ side and on the _____________ side.
reactants, products
200
Bonus x2!
Is the following chemical reaction possible. Explain!
No, it violates the law of conservation of matter/mass. The reaction should have the same number and type of atoms on the reactants and products side.
200
Given the following equation, what is the correct form of the conversion factor needed to convert the number of moles of O2 to the number of moles of Fe reacted?
4 Fe(s) + 3 O2 (g) → 2 Fe2O3 (s)
200
Predict the product(s) of the following reaction:
Al (s) + Cl2 (g) →_______
Al (s) + Cl2 (g) → AlCl3 (s)
300
How many moles of water are represented in the equation below:
2 moles of water (H2O)
300
Balance the following equation:
CaO(s) + CO2 (g) → CaCO3 (s)
Already Balanced!
300
Bonus!!
127 g of copper reacts with _______g of oxygen gas to produce 159 g of copper (II) oxide
B) 32 g O2
300
(Bonus!!)
If 3.0 moles Al2O3 decompose, how many moles of oxygen are produced? 2Al2O3 -> 4Al + 3O2
4.5 moles O2
300
Bonus!!
What coefficients will balance this chemical equation:
2, 2, 1
400
How many molecules of oxygen gas are represented in the balanced equation:
1 molecule of oxygen gas (O2)
400
Balance the following chemical reaction:
Al (s) + Cl2 (g) → AlCl3 (s)
2Al (s) + 3Cl2 (g) → 2AlCl3 (s)
400
Bonus x 2 !!
Calculate the total mass of the reactants and the total mass of the products in the chemical equation below:
4Fe(s) + 3 O2 (g) → 2 Fe2O3 (s)
Reactants = 319.4 g
Products = 319.4 g
400
Bonus!!
If 3.6 moles of C2H2 are burned, how many moles of CO2 are produced? 2C2H2 + 5O2 --> 4CO2 + 2H2O
7.2 moles CO2
400
Bonus!!
What is oxidized and what is reduced in the following equation:
Fe + HCl → FeCl3 + H2
Oxidized: Fe
Reduced: H+
500
How many atoms of Hydrogen are represented on the reactants side of the equation below:
4 atoms of Hydrogen
500
Bonus!!! (Double Points)
Balance the following chemical equation:
__Fe2O3(s) + __C(s) → __CO2(g)+ __Fe(s)
2Fe2O3(s) + 3C(s) → 3CO2(g)+ 4Fe(s)
500
Bonus x 2 !!
Calculate the total mass of the reactants and the total mass of the products in the chemical equation below:
C (s) + O2 (g) → CO (g)
2C (s) + O2 (g) → 2CO (g)
Reactants: 56.02 g
Products: 56.02 g
500
Bonus!!
The number of moles of oxygen gas needed to react with 4.00 mol of Mg is ________.
Mg(s) + O2 (g) → MgO(s)
2Mg(s) + O2 (g) → 2MgO(s)
Answer: 2.00 mol O2
500
Bonus!!
If 0.500 mol of acetylene is burned, how many moles of CO2 will be produced?
2 C2H2 (g)+ 5 O2 (g) → 4 CO2 (g) + 2 H2O(g)
1.00 mol CO2