PhotosynthesisLabReport
Lab Report: Photosynthesis
Name:
Purpose of this Lab
What is the goal of this lab? What question are you trying to answer, or what problem are you trying to explain?
To see how the plant changes the pH of the water.
Hypothesis
After reading the lab instructions (but before starting the lab) record your best educated guess about what will happen in the experiment. Explain what lead you to this hypothesis.
The think the pH of the water will change when the plant is added.
Experimental Design List the materials used in this lab, and a brief explanation of the procedures you followed. (You do not need to retype the procedure; simply summarize your procedures). Add #’s where necessary.
pH meter funnel Hydrilla
Test tube with water covered with a thin strip on the mouth beaker candle water jar splinter Data
Experiment 1 Data and Observations
Step 4
Record the initial pH value of the water in the beaker:
5.7
Step 8
Record the pH value of the water in the beaker at:
1:00 pm:
5.9
2:00 pm:
6.1
3:00 pm:
6.3
4:00 pm:
6.5
5:00 pm:
6.6
Step 12
Record the behavior of the glowing splinter after it’s placed in the test tube:
The flame turned yellow and burned out
Record the duration of the burn:
9 seconds
Experiment 2 Data and Observations
Step 3
Record the initial pH value of the water in the beaker:
5.7
Step 7
Record the pH value of the water in the beaker at:
8:00 am:
6.0
9:00 am:
6.4
10:00 am:
6.7
11:00 am:
7.1
12:00 pm:
7.4
Step 11
Record the behavior of the glowing splinter after it’s placed in the test tube: The flame was green and yellow and lasted 8.5 seconds.
Record the duration of the burn:
Experiment 3 Data and Observations
Step 3
Record your observations of the leaf after being removed from the boiling water and being dipped in ethanol:
When dipped in hot ethanol, the leaf turned yellow and the ethanol turned green.
What was accomplished by boiling the leaf in ethanol?
Name:
Purpose of this Lab
What is the goal of this lab? What question are you trying to answer, or what problem are you trying to explain?
To see how the plant changes the pH of the water.
Hypothesis
After reading the lab instructions (but before starting the lab) record your best educated guess about what will happen in the experiment. Explain what lead you to this hypothesis.
The think the pH of the water will change when the plant is added.
Experimental Design List the materials used in this lab, and a brief explanation of the procedures you followed. (You do not need to retype the procedure; simply summarize your procedures). Add #’s where necessary.
pH meter funnel Hydrilla
Test tube with water covered with a thin strip on the mouth beaker candle water jar splinter Data
Experiment 1 Data and Observations
Step 4
Record the initial pH value of the water in the beaker:
5.7
Step 8
Record the pH value of the water in the beaker at:
1:00 pm:
5.9
2:00 pm:
6.1
3:00 pm:
6.3
4:00 pm:
6.5
5:00 pm:
6.6
Step 12
Record the behavior of the glowing splinter after it’s placed in the test tube:
The flame turned yellow and burned out
Record the duration of the burn:
9 seconds
Experiment 2 Data and Observations
Step 3
Record the initial pH value of the water in the beaker:
5.7
Step 7
Record the pH value of the water in the beaker at:
8:00 am:
6.0
9:00 am:
6.4
10:00 am:
6.7
11:00 am:
7.1
12:00 pm:
7.4
Step 11
Record the behavior of the glowing splinter after it’s placed in the test tube: The flame was green and yellow and lasted 8.5 seconds.
Record the duration of the burn:
Experiment 3 Data and Observations
Step 3
Record your observations of the leaf after being removed from the boiling water and being dipped in ethanol:
When dipped in hot ethanol, the leaf turned yellow and the ethanol turned green.
What was accomplished by boiling the leaf in ethanol?