4.05 chemical reactions virtual laboratory. the plan review the different types of chemical...
TRANSCRIPT
4.05 Chemical Reactions
Virtual Laboratory
The Plan
• Review the different types of Chemical Reactions
• Complete the Virtual Lab via screen share/slides with teacher
• Make predictions of reaction types• Discuss the analysis questions• Complete the lab on your own
Before we Begin
• Please open your virtual lab in the course
Create/Download the Lab Form
• Copy and Paste the lab form into a document or download the pre-made form from the Chemistry Resource Center https://sites.google.com/site/chemistryflvs/
Let’s Review!
Please Open the Virtual Lab
Follow the Steps
Take note of the reactants
Write the Formula for the Reactants
Iron (III) and Copper (II) Sulfate
• First, identify the symbols and oxidation numbers
Iron (III) is Fe3+
Copper (II) is Cu2+
Sulfate is SO42-
• Next, write the formulas. Switch the oxidation numbers to become the opposite element/compounds subscript. Ignore the charges
Fe + CuSO4
Prediction
Fe + CuSO4
What type of reaction might this be?
Why?
Play the Video, Make Observations
Click Here
Next Reaction
Write the Formula for the Reactants
Lead (II) Nitrate and Potassium Iodide
• First, identify the symbols and oxidation numbers
Lead (II) is Pb2+
Nitrate is NO31-
Potassium is K1+
Iodide is I1-
• Next, write the formulas. Switch the oxidation numbers to become the opposite element/compounds subscript. Ignore the charges
Pb(NO3)2 + KI
Prediction
What type of reaction might this be?
Why?
Pb(NO3)2 + KI
Next
Next Reaction
Write the Formula for the Reactants
Magnesium Metal Ribbon and Hydrochloric Acid
• First, identify the symbols and oxidation numbers
Magnesium is Mg2+
Hydrochloric Acid is H1+ and Cl1- or HCl
• Can you write the reactant side of this equation?
Prediction
Mg + HCl
What type of reaction might this be?
Why?
Next
Next Reaction
Write the Formula for the Reactants
Electrolysis of Water
• First, identify the symbols and oxidation numbers
Water is H2O
• This lab is different right? You only have ONE reactant and they show you the products in the video. What is our equation?
Prediction
H2O
What type of reaction might this be?
Why?
LASTLY
Next Reaction
Write the Formula for the Reactants
Burning Magnesium
• First, identify the symbols and oxidation numbers
Magnesium is Mg2+
• This lab is different too! You only have ONE reactant. This forms a new substance at the end. What allowed the Mg to burn? What is our equation?
Prediction
Mg + O2
What type of reaction might this be?
Why?
Could it be something else?
Writing our balanced equations
* Fe + CuSO4
Iron (III) is Fe3+
Copper (II) is Cu2+
Sulfate is SO42-
Iron and Copper will switch places
Cu + Fe2(SO4)3
Balance this!
Cu + Fe2(SO4)3Fe + CuSO4
Is this balanced? What do we need to do to balance it?
What type of reaction is this?
Writing our balanced equations
*
Lead and Potassium will switch places
PbI2 + KNO3
Pb(NO3)2 + KI Lead (II) is Pb2+
Nitrate is NO31-
Potassium is K1+
Iodide is I1-
Balance this!
Is this balanced? What do we need to do to balance it?
What type of reaction is this?
Pb(NO3)2 + KI PbI2 + KNO3
Writing our balanced equations
*
Magnesium and Hydrogen will switch places**Remember that Hydrogen is a diatomic molecule**
H2 + MgCl2
Magnesium is Mg2+
Hydrochloric Acid is H1+ and Cl1- or HCl
Mg + HCl
Balance this!
Is this balanced? What do we need to do to balance it?
What type of reaction is this?
Mg + HCl H2 + MgCl2
Writing our balanced equations
*
H2 + O2
H2O **The video showed you the products**
Hydrogen and oxygen are both diatomic molecules
Balance this!
Is this balanced? What do we need to do to balance it?
What type of reaction is this?
H2 + O2H2O
Writing our Balanced Equations
Mg + O2
Magnesium is Mg2+
Oxygen is O2-
Not all combustion reactions involve organic compounds made of carbon and hydrogen, which means that the products are not always carbon dioxide and water. Other substances, both compounds and elements, can burn in oxygen. These reactions can often be categorized as synthesis reactions, but they are considered combustion reactions as well because a substance is reacting with oxygen and releasing energy.
Balance this!
Is this balanced? What do we need to do to balance it?
What type of reaction is this?
MgOMg + O2
Is there another choice?
Analysis
• #1~ We’ve written the balanced equations
• #2~ What does the law of conservation of mass state? Is this a closed container? Where did the gas go?
• #3~ Which reaction that we investigated can be more than one type?
Congrats!!
Great job! We did it!!
Questions?