Chem Lab 4 Day OneGet lab book out with paper. Today we will answer questions 4-1 through 4-6.

Are you dressed for lab?

Get apron. No goggles needed.

Backpacks at your feet.

Wait for instructions.

End page 37 today.

Chem Lab 4 Day TwoToday we will do activities

from pages 38 - 42.Ties hair back.

Are you dressed for lab?Get apron and goggles on.

Backpacks at your feet.Wait for instructions.End Page 42 today.

Chem Lab 4 Day ThreeGet lab book out with paper. Today we

will do questions 4-7 through 4-21.

Ties hair back.Are you dressed for lab?

Get apron and goggles on.Backpacks at your feet.

Wait for instructions.End page 47 today.

Chem Lab 4 Day four Today we will do questions 4-22

through 4-26. First we will review.

Ties hair back.Are you dressed for lab?

Get apron and goggles on.Backpacks at your feet.

Wait for instructions.End Page 50 today.

Precipitation Precipitation is the formation of a solid in a

solution during a chemical reaction. When the reaction occurs, the solid formed is called the precipitate, and the liquid remaining above

the solid is called the supernate.

Exothermic reaction. • If a reaction releases more energy

than it takes to keep it going, it is called an exothermic reaction.

• The reaction produces heat.

• Explosions are an example of the most violent form exothermic reactions.

Endothermic reaction

• If a reaction requires a constant application of energy to keep it going, it is called an endothermic reaction.

• The reaction produces a drop in temperature

• A chemical cold pack consisting primarily of ammonium nitrate and water is endothermic.

An operational definition answers two questions

• What do I do to tell when I have some of what I am defining?

• What do I do to tell how much I have of what I am defining?

• Use this information from yesterdays lab to answer question 4-26.

During today's lab look for and identify the following

• A precipitate – formation of a solid from a solution

• Endothermic reaction – produces a drop in temperature.

• Exothermic reaction – a reaction that produces heat.

Chem Lab 4 Day fiveGet lab book out with paper. Today we

will answer questions 4-27 through 4-30.

Ties hair back.Are you dressed for lab?

Get apron and goggles on.Backpacks at your feet.

Wait for instructions.End page 52.

Chem Lab 4 Day sixGet lab book out with paper. Today we

will answer questions 4-31 through 4-37.

Ties hair back.Are you dressed for lab?

Get apron and goggles on.Backpacks at your feet.

Wait for instructions.End page 55 today.

Chem Lab 4 Day sevenToday we will observe a lab

demonstration by Mr. Williams

EXTRA CREDIT ASSIGNMENT

• Write a 3 page paper on what you believe might have caused the Hindenburg to explode.

• Support your opinion with scientific evidence

• You must have a title page and a Works Cited page with at least 3 sources.

• This could be worth 100 test weighted points