Name _______________________________________________ Block _____ Physical Science Lab: Demonstrating 5 Chemical Reactions Lab Safety 1. Wear goggles, apron, closedtoe shoes 2. Do not take more of a reactant than your procedure requires. Leave some for the rest of the class. 3. Clean up your station when you are done. Chemical Reaction #1 Answers Procedure 1. Rinse the inside of a 125 mL flask with water. Pour out excess water into the sink, leaving the inside of the flask wet. 2. Drop a spoonful of iron filings into the flask 3. Stretch a balloon over the top of the bottle. Leave the balloon on the window sill in the warmth of the sun. 4. Make observations after 30 minutes. Your teacher will clean up this station. Observations: What changes tell you that a chemical reaction is taking place? Name the reactants and products Drawing or Description: Iron + Oxygen gas + Water → Iron (II) Hydroxide Fe + O + H O → Fe(OH) 2 2 2 Complete the formula and balance the equation Type of Reaction Chemical Reaction #2 Answers Procedure 1. Pour 100 mL of hydrogen peroxide into a 250 mL flask. Add 25 mL of liquid dish soap, and a drop of food coloring (optional). 2. Get a 250mL beaker, mix one packet of active yeast with warm water ( hot water will kill the yeast cells).Let sit for 5 minutes. 3. Pour the yeast mixture into the hydrogen peroxide mixture. 4. After you make your observations, dump waste into waste bucket, wash the flask and the beaker, place on drying rack. Observations: How Drawing or Description: can you tell a chemical reaction is taking place? Draw a picture or write a sentence. Name the reactants and products hydrogen peroxide → water + oxygen gas Complete the formula and balance the H O → ________ + O 2 2 2 equation Type of Reaction Chemical Reaction #3 Answers Procedure 1. Use a graduated cylinder to measure out 5 mL of hydrochloric acid. 2. Drop a few pieces of magnesium metal into the graduated cylinder. 3. Feel the bottom of the cylinder with your hand, observe what happens to the metal. 4. Dump leftover acid in the waste bucket. Rinse the cylinder and place on drying rack. Observations: How Drawing or Description: can you tell a chemical reaction is taking place? Draw a picture or write a sentence. Name the reactants and products hydrochloric acid + magnesium → magnesium chloride + hydrogen gas Complete the formula and balance the HCl + Mg → MgCl + ______ 2 equation Type of Reaction Chemical Reaction #4 Answers Procedure 1. Add one spoon of baking soda to the bottom of a 400 mL beaker. 2. Add 50 mL of vinegar to the baking soda in the beaker. 3. Feel the beaker with your hand and make observations. 4. Rinse the products down the sink with running water. Wash the beaker and put it on the drying rack. Observations: How Drawing or Description can you tell a chemical reaction is taking place? Draw a picture or write a sentence. Name the reactants and products sodium bicarbonate + acetic acid → acetate + dihydrogen carbonate Complete the formula and balance the NaHCO + HC H O → NaC H O + __________ 3 2 3 2 2 3 2 equation Type of Reaction Chemical Reaction #5 Demonstration Done by Teacher in Fume Hood Procedure 1. 2. Add a small scoop of Potassium Chloride to a test tube. Clamp the test tube with opening pointed in safe direction. 3. Heat the potassium chloride with the burner until molten. 4. Remove heat source and turn off. 5. With tongs, add a gummy bear to the molten potassium chloride Observations: How Drawing or Description can you tell a chemical reaction is taking place? Draw a picture or write a sentence. Name the reactants and products Glucose + Oxygen = Carbon Dioxide + Water Complete the formula and balance the equation Type of Reaction C H O + O → CO + ______ 6 12 6 2 2
© Copyright 2026 Paperzz