Laboratory 4 – Stoichiometry of

Copper (II) Chloride and Aluminum

Purpose: Determine the stoichiometry ofCuCl2 (aq) + Al (s) AlCl3 (aq) + Cu (s)

Materials: Copper (II) chloride solutionAluminum (2.5 cm x 2.5 cm), 2 500 mL beakers, ring stand, filter paper, balance, thermometer

Laboratory 4 – Stoichiometry of

Copper (II) Chloride and Aluminum

Procedure:

1.Weigh the Al foil. Place 10 mL of the CuCl2 solution in the one beaker and measure it’s temperature.2. Write you group number and period on the filter paper. Weight it and record the mass.3. Lightly crumple the foil and place in the beaker. You can push it under the surface with the thermometer. Lightly stir with the thermometer.

Laboratory 4 – Stoichiometry of

Copper (II) Chloride and Aluminum

Procedure (cont):4. Measure the temperature every 30 secs.5.After 5 mins., filter out the solid in the beaker. Rinse with tap water to get all the solid out of the beaker. 6. Place the filter paper in the oven and the filtrate in the waste beaker7. Thoroughly rinse the beakers, graduated cylinder, and glass funnel with tap water.8. Weigh the filter paper tomorrow.

Laboratory 4 – Stoichiometry of

Copper (II) Chloride and Aluminum

Mass of Aluminum (g)Mass of Filter Paper (g)

Time (min) Temperature (°C) Time (min) Temperature (°C)

0 2.50.5 3.01.0 3.51.5 4.02.0 4.5

Solid in the beakerLiquid in the beakerMass of Filter Paper (g) Day 2

Observations before the chemical reaction:

Temperature after the aluminum is added:

Observations after the addition of the aluminum:

Laboratory 4 – Stoichiometry of

Copper (II) Chloride and Aluminum

Analysis:Balance the equation, then use the mass of the aluminum to calculate the mass of copper theoretically produced. Compare this to the mass of copper determined by the experiment.