Chemical Reaction Lab Stations (What Happened?)

Chemical Reaction Lab Stations

What Happened?

Multiple Choice

What is a chemical reaction?

• changes the appearance of a substance, not its chemical composition.

• causes a substance to change into an entirely substance with a new chemical formula.

Lab Station 1: Penny, Vinegar, & Salt

Copper oxide forms when the copper is oxidized by its reaction with oxygen in the air. Copper oxide dissolves in water, but it usually takes a long time. The combination of vinegar (a weak solution of acetic acid), and table salt (sodium chloride) helps to dissolve the copper oxide, and also forms the blue copper(II) ion, which is soluble in water. The penny becomes shiny again! 

Multiple Choice

What is Cu atomic number? *Use Periodic Table*

• Atomic Number 13

• Atomic Number 35

• Atomic Number 55

• Atomic Number 29

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Multiple Choice

When copper interacts with oxygen it becomes... (Cu₂O)?

• copper (II) floride

• copper (II) oxide

• copper (II) chloride

Lab Station 2: Egg & Vinegar

In this experiment, acetic acid reacts with calcium carbonate to form carbon dioxide, calcium acetate, and water. The bubbles that form on the egg are the carbon dioxide and are a sign that a reaction is taking place.

Rubber Eggs:

https://msdlt.instructure.com/files/2582/download?download_frd=1

Multiple Choice

What is the chemical formula for calcium carbonate?

• CaC₃

• CaN₃

• CaCO₃

Lab Station 2: Egg & Vinegar

• Eggshells are made up of calcium carbonate. The chemical formula for calcium carbonate is CaCO₃. 

• Vinegar is a mixture made up of very dilute acetic acid. Therefore, vinegar contains acetic acid and water. The chemical formula for acetic acid is CH₃COOH or C₂H₄O₂.

Multiple Choice

How many atoms are in CH₃COOH?

• 6

• 8

• 11

• 7

Lab Station 2: Egg & Vinegar

• The calcium carbonate in the eggshell and the acetic acid in vinegar interact setting off a chemical reaction. First, the acetic acid and calcium carbonate form carbonic acid, H₂CO₃, and calcium acetate, Ca(CH₃COO)₂.

• 2CH₃COOH + CaCO₃ g H₂CO₃ + Ca(CH₃COO)₂

• Next, the carbonic acid breaks down to form carbon dioxide and water.

• H₂CO₃ (g) ----> H2O + CO₂

Lab Station 3: Cornstarch & Iodine

Synthesis Reaction (A+B -> AB)

Multiple Choice

What type of sandwich is a synthesis reaction?

• A Cheese & Turkey Sandwich that had the Cheese switched out for Lettuce

• Peanut Butter & Bread + Jelly= PB&J Sandwich

• A Turkey & Cheese Sandwich and A PB&J Sandwich. They will switch two ingredients, such as the Cheese and Jelly switching

Copper and Aluminum Lab - David's Digital Portfolio

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Multiple Select

Which chemical reactions occurred with the Copper Chloride and Aluminum? *Multiple Answer Choices*

• Color Change

• Precipitate

• Temperature Change

• Odor Change

• Production of Gas

Multiple Choice

What type of temperature reaction did Copper Chloride and Aluminum have?

• Exothermic

• Endothermic

Lab Station 5: Baking Soda & Vinegar

The baking soda and vinegar reaction is actually two separate reactions. The first reaction is the acid-base reaction.

The second reaction is a decomposition reaction. The carbonic acid formed as a result of the first reaction immediately begins to decompose into water and carbon dioxide gas.

Exploding Bags: https://msdlt.instructure.com/files/2563/download?download_frd=1

Multiple Choice

Which chemical equation is decomposition?

• AB + CD ---> AD + CB

• AB ---> A + B

Lab Station 6: Mentos & Coke

Why Do Mentos React w/ Coca Cola: https://www.reagent.co.uk/why-do-mentos-react-with-coca-cola/

Poll

Which lab station did you enjoy the most? You can select multiple answers.

• Lab Station 1: Penny, Vinegar, & Salt

• Lab Station 2: Egg & Vinegar

• Lab Station 3: Cornstarch & Iodine

• Lab Station 4: Copper Chloride & Aluminum

• Lab Station 5: Baking Soda & Vinegar