045

Objective: Thermite in Your Hand

Goals/ Purpose Demonstrate Exothermic Single Replacement Reaction.

Provide a quick, easy and safe version of the traditional thermite lab.

Standards:

MS-PS1-2: Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.

MS-PS1-5: Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.

Warm-Up:

• • Circle of Trust- Pick a norm.

  • Today's Vocab Escape Room Race Starting Line

  • Take 5 Warm- up

To Do List:

Take Attendance, 

Warm-up 

Safety:

• Produces sparks that may shoot several feet

• Goggles should be worn

• Be careful to keep a tight grip on the spheres so they don't fall on your foot.

• Be sure to keep your hands on the sides to avoid smashing your fingers.

A single replacement reaction occurs between the iron oxide (rust) and aluminum when struck with enough force. The reaction is very exothermic- sparks and noise are produced. Aluminum is more reactive than iron so it will replace the iron in iron oxide to form aluminum oxide and pure iron:

2Al + Fe2O3----> Al2O3 + 2Fe + Heat

Check for Understanding: Norm Focused Reflection

Homework: None 

Objective: Growing Copper Crystals

Goals/Purpose

• Demonstrate that metals are crystalline

• Demonstrate the formation of crystals from a chemical reaction

Standards:

MS-PS1-1: Develop models to describe the atomic composition of simple molecules and extended structures.

MS-PS1-2: Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.

Warm-Up: 

• • Circle of Trust- Pick a norm.

  • Today's Vocab Escape Room Race Starting Line

  • Take 5 Warm- up

To Do List:

Take Attendance, 

Warm-up, 

• Pour approximately 2-3 cm of copper sulfate crystals into preform or test tube.

• Add enough water to cover the copper sulfate.

• Place a small piece of water soaked cotton pad on top of the copper sulfate

  • • • • A pencil or stirring rod can be used to push it into place.

• Place approximately 1-2cm of salt (sodium chloride) into the test tube.

• Cover the salt layer with water. Pour slowly and gently to avoid or stirring or mixing the layers

• Add another small piece of wet cotton pad as a barrier layer.

• Clean the iron nails with steel wool.

• Place two nails on top of the second barrier.

• Add water to cover the nails.

• Place the cap on the preform or test tube. Label the cap.

• Place preform into rack where it will not be disturbed.

• Make observations daily. 

A single replacement reaction occurs in the preform. Iron (nail) is more reactive than copper so it will replace it in the solution forming pure copper crystals.

This lab mimics the formation of pure mineral copper deposits in Earth's crust.

CuSO4 + Fe ----> Cu + FeSO4

Check for Understanding: Norm Focused Reflection

Homework: None