Lab practice #1 MS

Lab practice #1

Materials

GreenHouse effect

• Vernier® interface
• Vernier® temperature probe
• 250 or 500 mL beaker
• Forceps
• Plastic wash bottle
• 100 mL graduated cylinder
• Lamp with 100 watt bulb
• Balance
• Dry ice
• Distilled water
• Universal pH´s indicator

Per team bring...

• Laptop with Logger Pro installed.
• Masking Tape
• Marker (sharpie)
• Soil

Problem

Sequence of the practice

• What is the relation between the temperature rise and the amount of carbon dioxide?
• Calculate the "Temperature change/mass" ratio with the formula

Data processing

Data collection

Conclusions

Experiment 1

Experiment 2

2.1

2.2

Read the practice

Experiment 2.2

• Repeat the process in the second beaker.
• Add 1 cm of soil.
• Weight less than a gram of dry ice and place it into the beaker and close it TIGHTLY with the plastic wrap.
• Allow the dry ice to sublimate, you can help it by moving the beaker with the soil. DO NOT let the gas to escape!!
• Place the lamp about 3-5 cm from the beaker.
• Turn the lamp on and start the recording in Logger Pro.
• After 4 min, turn the lamp off and keep recording for 3 more min.
• Stop the recording and save the graph.

Measure the height reached by the CO2 gas from the water surface.

Step 4

Add a piece of dry ice into the water. Observe the changes in the color of the water. Register your observations

Step 3

Step 2

Step 1

Add two drops of universal indicator to the water

Pour 75 ml of tap water in the crystalizer dish

Experiment 2.1

• In a beaker, tape the tip of the Vernier probe to the ruler. The tip should be 3 cm from the border of the ruler
• Connect the Vernier probe into the computer with Logger Pro and set up the measurment to 10 min.
• Add 1 cm of soil into the beaker and close it TIGHTLY with the plastic wrap.
• Place the lamp about 3-5 cm from the beaker.
• Turn the lamp on and start the recording in Logger Pro.
• After 4 min, turn the lamp off and keep recording for 3 more min.
• Stop the recording and save the graph.