bioligy lab assignment
Lab Report: Scientific Method Name: nayleen larios _____________________________________________________________
Purpose of this Lab
What is the goal of this lab? What question is it trying to answer, or what problem is it trying to explain?
Too see the temperature of higher salt concentrated water; what water has a higher boiling point.
Hypothesis
After reading the lab instructions - but before starting the lab - record your best “educated guess” about what will happen in the experiment. What hypothesis can you generate about the effect of adding salt to water?
The water with the most salt will have a lower temperature.
Experimental Design
List the materials used in this lab, and the procedure you followed.
Materials:
1.salt
2. tap water
3.small pot
Procedure (list steps in the order in which you performed them):
1.put the amount of salt in measuring cup as instructed than adding the tap water to the cup as well
2. Pour the salt concentrated water in to the pot, boil the water.
3. recorded the temperatures of the different salinity water
Data
Record the data you collected in the lab. (The data table and the graph.)
Table 2. Boiling point temperatures of various salt solutions.
Beaker/Concentration of NaCl (M)
Boiling Point Temperature
(°C)
Pure tap water
190
1 tablespoon salt solution
210
2 tablespoon salt solution
250
3 tablespoon salt solution
300
Graph the data from Table 2
Label each axis (X and Y will NOT do).
Devise a scale for each axis and label that scale (1, 2, 3…)
Plot the data points.
Connect the data points by drawing a straight line.
Title the graph.
Analysis
Analyze the data you collected in the lab. How does the data presented above relate to the hypotheses you generated earlier in lab? Are any hypotheses disproved by your experiment? Use your graph to determine the boiling point of a solution made with 2 ½ tablespoons. This use of a graph has generated a hypothesis that a 2 ½ tablespoon solution boils at
Purpose of this Lab
What is the goal of this lab? What question is it trying to answer, or what problem is it trying to explain?
Too see the temperature of higher salt concentrated water; what water has a higher boiling point.
Hypothesis
After reading the lab instructions - but before starting the lab - record your best “educated guess” about what will happen in the experiment. What hypothesis can you generate about the effect of adding salt to water?
The water with the most salt will have a lower temperature.
Experimental Design
List the materials used in this lab, and the procedure you followed.
Materials:
1.salt
2. tap water
3.small pot
Procedure (list steps in the order in which you performed them):
1.put the amount of salt in measuring cup as instructed than adding the tap water to the cup as well
2. Pour the salt concentrated water in to the pot, boil the water.
3. recorded the temperatures of the different salinity water
Data
Record the data you collected in the lab. (The data table and the graph.)
Table 2. Boiling point temperatures of various salt solutions.
Beaker/Concentration of NaCl (M)
Boiling Point Temperature
(°C)
Pure tap water
190
1 tablespoon salt solution
210
2 tablespoon salt solution
250
3 tablespoon salt solution
300
Graph the data from Table 2
Label each axis (X and Y will NOT do).
Devise a scale for each axis and label that scale (1, 2, 3…)
Plot the data points.
Connect the data points by drawing a straight line.
Title the graph.
Analysis
Analyze the data you collected in the lab. How does the data presented above relate to the hypotheses you generated earlier in lab? Are any hypotheses disproved by your experiment? Use your graph to determine the boiling point of a solution made with 2 ½ tablespoons. This use of a graph has generated a hypothesis that a 2 ½ tablespoon solution boils at