Chapter 4 Solubility

Chapter 4: Solubility


Exp. 4.6 Isoproponal as a Solvent

Data and Observations

  Qualitative Observations

 

Solubility in H2O

Solubility in Isopropanol

Sugar

 

 

Citric acid

 

 

TOP

 

 

Baking Soda

 

 

 

 

 


  






                             VS- very soluble,     S- soluble,     I- insoluble

Conclusion statement

Respond to the purpose based on the class data collected. Leave the details for the discussion.

Discussion (Use complete sentences and part of the question in your responses. )
1. Explain why the solubilities of sugar and citric acid in isopropanol can be used to distinguish these substances?
2. Can solubility in isopropanol be used to distinguish any other solid substances? Explain.
3. Which substances can be distinquished by using their solubilities in water? Explain. 
4. Read the last several paragraphs of Exp. 4.6 in your textbook. Describe or neatly draw a clearly labeled sketch illustrating how solubility can be used to distinguish different liquids.

Sources of Error
 Respond to at least one of the follwing questions.
1. How might the results of this experiment been affected if different amounts of solvents were used? Explain.
2. How might the results of this experiment been affected if a lot of the solids was used instead of tiny amounts?




Exp. 4.4 The Effect of Temperature on Solubility (2012-abbrev. write-up)

Data and Observations

-Qualitative observations Table (for Ms. Hakhamimi's classes)

DATA and OBSERVATIONS:
Include your responses to the blue dot questions in this section.


Conclusion statement

        -respond to the purpose based on the class data collected.

Discussion
(Convince your reader! Convince your reader! Convince your reader!)
        1. How does temperature affect solubility? Convince me by describing qualitative data collected.
        2. Does temperature affect the solubility of different substances in the same way? Convince me!
        3. 
Is solubility at different temperatures a characteristic property? Explain.  
        4. Define precipitate.   
Sources of Error
        1.  If a pair of students did the experiment and they got the same result in BOTH test tubes,
                how would you account for this? Explain.  


Exp. 4.3 Comparing the Concentration of Saturated Solutions
Procedure (Not to be included in write-up.)

Data and Observations
-Qualitative observations
-Histogram
Conclusion statement
        -respond to the purpose based on the data collected.
Discussion (Convince your reader! Convince your reader! Convince your reader!)
        1.
Define concentration. Is this a characteristic property of the two substances? Support.
        2. Define a saturated solution.

        3. Define Solubility.
( Be resourceful.)
        4. Evidence is needed for this response to be complete. Describe if solubility is a characteristic property?                         
            Give two explanations and support each with descriptions of data collected from this experiment as evidence.

         
      
Sources of Error
        1. There are three steps of the procedure that could have introduced error into the results. Identify one step and its effect either on the mass of the solute or the volume of solvent.

        2. How would the error identified above have affected your calculated concentration of the saturated solution?




Exp. 4.7 The Solubility of Carbon Dioxide


Data and Observations

- Include responses/calculations to blue dot questions.
- Include histogram

Conclusion statement 

        -respond to the purpose based on the class data collected.

Discussion
(Convince your reader! Convince your reader! Convince your reader!)
        1. Compare the histogram's strong central tendency of the solubility of carbon dioxide (at 20oC) with the actual value on
            p. 87. Include the data in your comparison.
        2. Describe the measurement and the calculation required to find the mass of carbon dioxide gas dissolved. 
        3. Respond to TQ #23 on p. 86. Include part of the question in your response.
        4.
a. What is the process that plants use to make there own food?
            b. What do plants need in order to use this process?
            c.  Based on the results of this experiment explain why plants can live in ponds, lakes, and oceans all over the world.

           
Sources of Error 
       1. Describe an error in the experiment that could explain your response to question number one of the discussion.
           Do not write human error or made a mistake measuring or calculating.






Exp. 4.4 The Effect of Temperature on Solubility (2012-abbrev. write-up)

Data and Observations

-Qualitative observations Table (for Ms. Hakhamimi's classes)

DATA and OBSERVATIONS:
Include your responses to the blue dot questions in this section.


Conclusion statement

        -respond to the purpose based on the class data collected.

Discussion
(Convince your reader! Convince your reader! Convince your reader!)
        1. How does temperature affect solubility? Convince me by describing qualitative data collected.
        2. Does temperature affect the solubility of different substances in the same way? Convince me!
        3. 
Is solubility at different temperatures a characteristic property? Explain.  
        4. Define precipitate.   
Sources of Error
        1.  If a pair of students did the experiment and they got the same result in BOTH test tubes,
                how would you account for this? Explain.  



Exp. 4.3 Comparing the Concentration of Saturated Solutions
Procedure (Not to be included in write-up.)

Data and Observations
-Qualitative observations
-Histogram
Conclusion statement
        -respond to the purpose based on the data collected.
Discussion (Convince your reader! Convince your reader! Convince your reader!)
        1.
Define concentration. Is this a characteristic property of the two substances? Support.
        2. Define a saturated solution.

        3. Define Solubility.
( Be resourceful.)
        4. Evidence is needed for this response to be complete. Describe if solubility is a characteristic property?                         
            Give two explanations and support each with descriptions of data collected from this experiment as evidence.

         
      
Sources of Error
        1. There are three steps of the procedure that could have introduced error into the results. Identify one step and its effect either on the mass of the solute or the volume of solvent.

        2. How would the error identified above have affected your calculated concentration of the saturated solution?




Exp. 4.1 Dissolving a Solid in Water


Data and Observations
-Class Data table.
Conclusion statement
        -respond to the purpose based on the data collected.

Discussion 
 

        1. Describe evidence that was collected during the experiment that supports the conclusion statement. 

        2. Define a saturated solution.
        3. (Write this sentence and fill in the blanks) Within the orange solution that you created, the orange solid was the
            _____ and the water was the ______.
        4. For the resulting solution when
0.60 g was put into 20 cm3 of water, calculate the number of grams of orange solid
           that completely dissolved in each centimeter cubed of water, (i.e. the concentration), Show the calculation setup.

Sources of Error
        1. The second addition of 0.30 g of the orange solid should have dissolved in 5 ml of water. Describe one possible                    reason why some groups did not get all of the second addition of the orange solid to dissolve.

        2. Describe another explanation for why the second addition of the 0.30g did not completely dissolve in 5 ml.
            (One hint: Reread the blue dot questions.)


Exp. 4.3 Comparing the Concentration of Saturated Solutions
Procedure (Not to be included in write-up.)

Data and Observations
-Qualitative observations
-Histogram
Conclusion statement
        -respond to the purpose based on the data collected.
Discussion (Convince your reader! Convince your reader! Convince your reader!)
        1.
Define concentration. Is this a characteristic property of a the two substances? Support.
        2. What is a saturated solution.

        3. Define Solubility.
(Be resourceful if you need to be.)
        4. Describe whether or not solubility is a characteristic property? Give two explanations and support each with descriptions of data collected from the experiment as evidence.

         
      
Sources of Error
        1. There are three steps of the procedure that could have introduced error into the results. Identify one step and its effect either on the mass of the solute or the volume of solvent.

        2. How would the error identified above have affected your calculated concentration of the saturated solution?





Exp. 4.7 The Solubility of Carbon Dioxide

Data and Observations

- Include responses/calculations to blue dot questions.
- Include histogram

Conclusion statement 

        -respond to the purpose based on the class data collected.

Discussion
(Convince your reader! Convince your reader! Convince your reader!)
        1. Compare the histogram strong central tendency of the solubility of carbon dioxide with the actual value on p. 87.
        2. Describe the measurements and calculations required to determine the mass of carbon dioxide gas that was dissolved. 
        3. Respond to TQ #23 on p. 86. Include part of the question in your response.
        4.
Plants use carbon dioxide to make their own food via photosynthesis. Based on what you learned in this experiment
            explain why plants can live in ponds, lakes, and oceans all over the world.

           
Sources of Error 
       1. How would the calculated solubility of carbon dioxide in water have been affected if you had measured too large of
           a volume for the collecting bottle?


Two Gases
Data and Observations
-Data tables: at least two, titled Qualitative Observations and Results
Conclusion statement
        -respond to the purpose based on the results.
Discussion
(Convince your reader! Convince your reader! Convince your reader!)
         
Read 4.8, 4.9 and 4.10 for some important information.
        -"The gas produced when Mg was added to sulfuric acid was _____, because...."
        -"The gas produced when MgCO3 was added to sulfureic acid was ____, because..."
        - Describe any new characteristic properties discovered.
Sources of Error
        -Describe specific procedural errors that could have affected the results.
               - Such as not collecting enough gas.


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