Balanced Equations
Balance the following equation
Lithium chloride reacts with hydrogen to form hydrogen chloride and lithium
2LiCl + H2 -> 2HCl + 2Li
How many atoms are in 5.0 moles of Sodium?
3.0 x 1024 atoms Na
What is the mole ratio comparing Water and carbon Dioxide for the following equation?
C3H8 + 5O2 -> 4H2O + 3CO2
4 moles water / 3 moles CO2
True/ False
The amount of limiting reagent determines the Theoretical yeild
(Theoretical Yield)
True
What is Mr. Nelson's favorite color?
Orange
Balance the following reaction, and identify reaction type
Nitrogen gas reacts with hydrogen gas to form ammonia.
N2 + 3H2 -> 2NH3
Combiniation/synthesis
How many moles are in 100.0 Liters of Oxygen gas?
4.464 Moles O2
C3H8 + 5O2 -> 4H2O + 3CO2
Given 3.5 moles O2, How many moles of H2O will be produced?
2.8 moles H2O
Define limiting reagent
Reactant that runs out first in a chemical reaction
Product actually formed from experimentation.
Balance the following equation
H2SO4 + NaCl -> Na2SO4 + HCl
H2SO4 + 2NaCl -> Na2SO4 + 2HCl
How many moles are in 20.5 grams of Hydrogen?
10.3 moles of H2
C3H8 + 5O2 -> 4H2O + 3CO2
Given 25.0 moles of C3H8, How many moles of CO2 will be produced?
75.0 moles CO2
MgCl2 + H2 -> 2HCl + Mg
Given 5.0 moles H2 , and 10.0 moles MgCl2
1) Find the limiting/excess reagent
2) Calculate theoretical yield of HCl in grams
1) Limiting reagent - H2
10.0 moles H2 needed to react with 10 moles MgCl2, only have 5.0
2) Theoretical yield of HCl- 365 grams HCl
Moles H2 -> Moles HCl -> Grams HCL
What is a theoretic yield?
Max amount of product formed in reaction
Balance the following equation, and identify the reaction type.
C3H8 + O2 -> H2O + CO2
C3H8 + 5O2 -> 4H2O + 3CO2
Combustion
How many atoms are in 25.0 grams of Sodium ?
6.54 x 1023 atoms Na
C3H8 + 5O2 -> 4H2O + 3CO2
Given 50.0 grams of C3H8, how many grams of H2O will be produced?
81.8 g H2O
2Mg + O2 -> 2MgO
Given 2.0 moles O2 and 3.0 moles Mg :
1) Find the limiting/excess reagent
2) What is the theoretical yield of MgO in grams ?
1) Limiting- Mg
2) Theoretical yield of MgO -
3 moles or 120.9 grams MgO
The equation for calculating percent yield.
What is (actual yield/Theoretic yield ) x 100%
Balance the following and Identify reaction type
Aluminum reacts with hydrochloric acid to form aluminum chloride and Hydrogen.
2Al + 6HCl -> 2AlCl3 + 3H2
Single replacement
How many atoms of Sodium are in 250 g of sodium
6.5 x 1024 atoms Na
C3H8 + 5O2 -> 4H2O + 3CO2
Given 25.0 grams of C3H8, how much CO2 in liters will be produced?
38.2 Liters CO2
2H2 + O2 -> 2H2O
Given 5.0 g H2 and 10.0 g O2
1) Find limiting/excess reagent
2) Calculate theoretical yield of H2O in liters
1) Limiting reagent - O2
2) Theoretical yield of H2O in liters - 14 g
Mass O2 -> Moles O2 -> moles H2O -> Liters H2O
What is a mole ratio, and what does it allow us to do?
Mole ratio changes the substance we are talking about.
It allows us to predict amount of product formed or the amount of reactant needed.