Name: ________________________________________
Date: _______________
Period: _____
Chemical Reactions Lab
For each station follow the procedures and answer the questions. Remember that you and your group
members should not be writing the same information word for word, instead you are working together,
discussing your lab, and then answering questions in your own words! All questions must be answered in
complete sentences.
How do we know that a chemical reaction has taken place?
Complete the venn diagram below for the changes in temperature of a chemical reaction.
Endothermic
Exothermic
What is the law of conservation of mass?
How do we show the conservation of mass in a chemical equation?
Pre-AP Chemical Reactions
Hydrogen Peroxide & Yeast
Materials: Yeast, Hydrogen Peroxide, Beaker, Graduated Cylinder, Thermometer
1. Observe the physical properties of yeast; record your observations.
2. Pour 20 mL of hydrogen peroxide into the beaker, and record the temperature. __________
3. Add a ½ spoonful of yeast to the hydrogen peroxide.
4. After 2 minutes, measure the temperature of the solution. __________ (Do not stir with the
thermometer!)
5. Describe the chemical change that occurred when combing hydrogen peroxide and yeast; include the
words endothermic or exothermic.
Baking Soda and Vinegar
Materials: Baking Soda, Vinegar, Beaker, Graduated Cylinder, Thermometer, Spoon
1. Observe the physical properties of baking soda; record your observations.
2. Pour 20 mL of vinegar into the beaker, and record the temperature. __________
3. Add 1 spoonful of baking soda to the vinegar.
4. After 2 minutes, measure the temperature of the solution. __________
5. Describe the chemical change that occurred when combing baking soda and vinegar; include the words
endothermic or exothermic.
Pre-AP Chemical Reactions
Citric Acid & Baking Soda
Materials: Citric Acid, Baking Soda, Water, Ziploc Bag, Spoon, Graduated Cylinder
1. Observe the physical properties of the citric acid; record your observations. Observe the physical
properties of the baking soda; record your observations.
2. Place a small scoop of citric acid and a small scoop of baking soda in a plastic bag.
3. Measure 10 mL of water in a graduated cylinder; add the water to the bag.
4. Allow the bag to sit for 2 minutes.
5. Describe the chemical change that occurred when combing baking soda, citric acid and water; include
the words endothermic or exothermic.
Calcium Chloride & Water
Materials: Calcium Chloride, Water, Small Paper Cup, Craft Stick, Graduated Cylinder, Thermometer
1. Observe the physical properties of calcium chloride; record your observations.
2. Place a spoonful of calcium chloride in the paper cup.
3. Measure 25 mL of water; add the 25 mL of water to the paper cup, stir well with the craft stick.
4. Allow the cup to sit for 2 minutes.
5. Describe the chemical change that occurred when combing calcium chloride and water; include the
words endothermic or exothermic.
Pre-AP Chemical Reactions
Epsom Salt & Distilled Water
Materials: Beaker, Epsom Salt, Distilled Water, Thermometer, Spoon
1. Observe the physical properties of Epsom salt; record your observations.
2. Pour 20 mL of distilled water into the beaker; record the temperature. __________
3. Add a ½ spoonful of Epsom salt to the distilled water.
4. After 2 minutes, measure the temperature of the solution. __________
5. Describe the chemical change that occurred when combing Epsom salt and distilled water; include the
words endothermic or exothermic.
Ammonia & Grape Juice
Materials: Ammonia, Grape Juice, Test Tube, Thermometer, Test Tube Rack, 2 Pipettes
1. Observe the physical properties of ammonia; record your observations.
2. Observe the physical properties of grape juice; record your observations.
3. Place 20 drops of ammonia in a test tube; add 20 drops of grape juice to the test tube.
4. Describe the chemical change that occurred when combing ammonia and grape juice; include the
words endothermic or exothermic.
Pre-AP Chemical Reactions
Red Bull & Milk
Materials: Red Bull, Whole Milk, Beaker, Graduated Cylinder
1. Observe the physical properties of milk; record your observations.
2. Observe the physical properties of Red Bull; record your observations.
3. Pour 30 mL of milk in a beaker; add 30 mL of Red Bull to the beaker.
4. Describe the chemical change that occurred when combing milk and Red Bull.
One of the chemical reactions that occurs in the formation of glass is the combining of calcium carbonate
(CaCO3) and silica (SiO2) to form calcium silicate (CaSiO3) and carbon dioxide (CO2):
CaCO3 + SiO2  CaSiO3 + CO2
Describe this reaction using the names of the chemicals. Discuss which bonds are broken and how atoms are
rearranged to form new bonds.
When solutions of calcium chloride (CaCl2) and silver nitrate (AgNO3) are mixed, calcium nitrate [Ca(NO3)2] and
a white precipitate, or residue, form. Determine the chemical formula of the precipitate. In this reaction Ag has a
charge of 1+.
CaCl2 + 2AgNO3  2________ + Ca(NO3)2
Pre-AP Chemical Reactions