4.05 Chemical Reactions Virtual Laboratory

Review the different types of Chemical Reactions 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

Please open your virtual lab in the course 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  Cu2+ SO42- 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  Pb2+ NO31- Pb(NO3)2 + KI 

Prediction Pb(NO3)2 + KI  What type of reaction might this be? Why?

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?

Mg + O2 Prediction 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 Fe3+ SO42-  Cu + Fe2(SO4)3

Fe + CuSO4  Cu + Fe2(SO4)3 Balance this! Is this balanced? What do we need to do to balance it? What type of reaction is this?

Writing our balanced equations Pb(NO3)2 + KI  * Lead (II) is Pb2+ Nitrate is NO31- Potassium is K1+ Iodide is I1- Lead and Potassium will switch places K1+ NO31- Pb2+ I1-  PbI2 + KNO3

Pb(NO3)2 + KI  PbI2 + KNO3 Balance this! Is this balanced? What do we need to do to balance it? What type of reaction is this?

Writing our balanced equations * Mg + HCl  Magnesium is Mg2+ Hydrochloric Acid is H1+ and Cl1- or HCl Magnesium and Hydrogen will switch places **Remember that Hydrogen is a diatomic molecule** Mg2+ CI1-  H2 + MgCl2

H2 + MgCl2 Mg + HCl  Balance this! Is this balanced? What do we need to do to balance it? What type of reaction is this?

Writing our balanced equations H2O  * **The video showed you the products** Hydrogen and oxygen are both diatomic molecules  H2 + O2

Balance this! H2O  H2 + O2 Is this balanced? What do we need to do to balance it? What type of reaction is this?

Writing our Balanced Equations Mg + O2 Magnesium is Mg2+ Oxygen is O2- From the lesson 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! Mg + O2  MgO Is this balanced? What do we need to do to balance it? What type of reaction is this? Is there another choice?

#1~ We’ve written the balanced equations 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?