Name/……………………….
Date/…………………..
Grade 9-CHEMICAL REACTIONS LAB
Pre-Lab Discussion:
A chemical reaction results in the formation of one or more “new” substances. These
new substances differ in chemical properties and composition from the original
substance. Iron rusting and paper burning are two examples of chemical change.
This experiment will help you understand the different signs of a chemical reaction
Equipment and Materials:
Goggles
Blue CuSO45H2O
NaCl
Test tubes
Mortar and pestle
HCl (0.5 M)
Evaporating dish
Water dropper
AgNO3 (0.5 M)
Ceramic plate
Paper (5 cm square)
Mg ribbon (Mg)
Micro spatula
Wire gauze
Hot plate
Candle
Matches
Vinegar
One Bunsen burner
Test tube clamp
Baking soda
Safety precautions
 Don’t ingest or sniff any chemicals; don't eat or drink.
 Don’t touch chemicals; use gloves, holders, and thongs.
 Have your glasses (goggles) on during heating.
Procedure:
After completing each step, fill in the information in Table 1.
 Station 1 (Demonstration)
The teacher will burn a piece of magnesium ribbon
 Station 2
Secure a candle to a ceramic square and allow it to burn for 30 seconds.
 Station 3
1. Add a spatula of NaCl (Sodium Chloride) to a test tube. Mix it with 3 ml of water and
stir.
2. Add 3-4 drops of AgNO3 (Silver nitrate) to the mixture you made in the previous step.
CLEANUP: pour down the sink and wash the well plate
 Station 4
1. Cut a small piece of Mg (Magnesium) ribbon.
2. Place the piece of Mg in a test tube and add a few drops of HCl (Hydrochloric Acid).
Use extreme care and gloves when handling acids!
CLEANUP: Wait until all the Mg has reacted (add more acid if necessary), then pour
the mixture down the sink with running water. Rinse well.

Station 5
Add a few drops of vinegar into a test tube. Add 1 micro spatula of baking soda
(sodium bicarbonate).
CLEANUP: Pour the new product down the sink. Rinse the well plate with water.
 Station 6
1. In a dry test tube heat one spoonful of blue CuSO45H2O until it turns black.
2. To the residue from reaction (step 1) add 2 ml dilute hydrochloric acid with a
pipette.
Table 1
Reaction
Burning Magnesium ribbon
Burning a Candle
Mixing NaCl with AgNO3
Mixing HCl with Mg
Heating CuSO45H2O
Adding HCl to the burnt
black CuSO4
Mixing Vinegar and Sodium
bicarbonate (baking soda)
Your Observations