Decomposition Of Cuco3 A Third Or Quarter 
10/03/15 – Sher Bindahnee Group members: Claire Lee and Carrie Gale – Rm 53
DECOMPOSITION OF COPPER CARBONATE (CuCO3)
AIM – To investigate the thermal decomposition of copper carbonate. (qualitative assessment)
HYPOTHESIS – The products of the decomposition of copper carbonate will be a metal oxide (CuO) and carbon dioxide gas.
APPARATUS –
ITEM
QUANTITY/CONCENTRATION
Copper carbonate
2 g
Limewater (saturated Ca(OH)2 solution)
10 mL
Bunsen burner
Matches
Test tubes
5
Retort stand, boss head and clamp
1
Gas delivery tube and cork stopper
1
Sulfuric acid (H2SO4)
10 mL 1 mol/L
Spatula
1
Copper sulfate
3 mL
Cont….
PROCEDURE
i) EXPERIMENT DESIGN TABLE
Variable
Definition
Experiment variable
Independent variable
The factor changed
Heat
Dependent variable
The factor measured
Substances produced
Constant variables
Factors kept same to make the test fair
Control
The test to which the experiment is compared
Number of replicates
Repeats decrease error and establish reliability
ii) METHOD
1. A spatula was used to
2. II. Preparation of carbon dioxide by decomposition of a carbonate.
3.
4. 1. Weigh and record the mass of a large test tube that is clean and dry.
5.
6. 2. Weigh out about 2 grams of copper (II) carbonate into the large test tube. Record the exact weight of the test tube + copper (II) carbonate on your lab report.
7. 3. Insert a rubber stopper fitted with a rubber delivery tube into the mouth of the large test tube. (See diagram.) Clamp the test tube to a ring stand. Insert a glass tube into the end of the rubber delivery tube. Pour 5 mL of limewater into a small clean test tube.
8. Heat the test tube containing the CuCO3 until you see a change in color. Then insert the glass tube into the limewater. Observe the appearance of the limewater as gas given off by the reaction forms bubbles in the limewater. Continue heating until all of the CuCO3 has changed color. Remove the delivery tube from the limewater
DECOMPOSITION OF COPPER CARBONATE (CuCO3)
AIM – To investigate the thermal decomposition of copper carbonate. (qualitative assessment)
HYPOTHESIS – The products of the decomposition of copper carbonate will be a metal oxide (CuO) and carbon dioxide gas.
APPARATUS –
ITEM
QUANTITY/CONCENTRATION
Copper carbonate
2 g
Limewater (saturated Ca(OH)2 solution)
10 mL
Bunsen burner
Matches
Test tubes
5
Retort stand, boss head and clamp
1
Gas delivery tube and cork stopper
1
Sulfuric acid (H2SO4)
10 mL 1 mol/L
Spatula
1
Copper sulfate
3 mL
Cont….
PROCEDURE
i) EXPERIMENT DESIGN TABLE
Variable
Definition
Experiment variable
Independent variable
The factor changed
Heat
Dependent variable
The factor measured
Substances produced
Constant variables
Factors kept same to make the test fair
Control
The test to which the experiment is compared
Number of replicates
Repeats decrease error and establish reliability
ii) METHOD
1. A spatula was used to
2. II. Preparation of carbon dioxide by decomposition of a carbonate.
3.
4. 1. Weigh and record the mass of a large test tube that is clean and dry.
5.
6. 2. Weigh out about 2 grams of copper (II) carbonate into the large test tube. Record the exact weight of the test tube + copper (II) carbonate on your lab report.
7. 3. Insert a rubber stopper fitted with a rubber delivery tube into the mouth of the large test tube. (See diagram.) Clamp the test tube to a ring stand. Insert a glass tube into the end of the rubber delivery tube. Pour 5 mL of limewater into a small clean test tube.
8. Heat the test tube containing the CuCO3 until you see a change in color. Then insert the glass tube into the limewater. Observe the appearance of the limewater as gas given off by the reaction forms bubbles in the limewater. Continue heating until all of the CuCO3 has changed color. Remove the delivery tube from the limewater