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Extended Inquiry Project –Year 10 Extension Science: Chemistry

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					                   Extended Inquiry Project –Year 10 Extension Science: Chemistry
The instructions are as follows:
1. Conduct at least two experiments from the set provided– you may work with one partner.
 Each experiment is numbered and students will randomly select a number to obtain an instruction sheet.
 Each instruction sheet will have a random number and will have slightly different conditions (see instructions).
 Experiments will be done over two periods, thus enabling each student to complete at least two experiments.
 All of the experiments will require a 1cm2 (1cm x 1cm) of zinc metal weighed accurately to 3 decimal places.
 The zinc will need to be polished with steel wool to remove any foreign material or oxides prior to weighing.
        a. Wear safety goggles when conducting experiments.
        b. Wash and dry your hands before sitting back down at your work desk.
        c. Collect and record your observations and numerical data on the “practical observation sheet” (below).
        d. Hand these in to your teacher to be assessed and collated for the whole class:
                 i. Before beginning part 2 you will be given the whole set of class data to use in your report.

2. Write a Practical Activity Report based on the whole class data set using the criteria provided:
      a. Research the chemicals involved, the reaction that occurred and how the different variables (temperature
           and concentration) may have affected the results and include ideas from your research in your report!
      b. Describe what you believe to be the purpose of the activity.
               i. Write a balanced chemical equation for any observed chemical reaction.
      c. Write one or more hypothesis that would appear to be true for the class data.
      d. List the materials used by all groups
      e. Describe the procedure for all groups and how they may have been different for different trials
      f. Tabulate the class numerical data in a systematic way so that it makes sense.
               i. Graph the appropriate pairs of variables. Clearly label the graphs with the independent variable on
                   the horizontal axis (i.e. the X-axis) and similarly, the dependant variable on the vertical axis. Write a
                   suitable heading for each graph.
      g. Write a ‘Discussion’ providing evidence and reasons to either support or reject your original hypothesis(s).
      h. Write a ‘Conclusion’ that indicates what you believe is happening, and is supported by the experimentation.
      i. Include references from your research.

                             Brief Description of Required Practical Activity Report Sections

Title:                  Briefly describe what was done.

Aim:                    What was the purpose of the experiment?

Hypothesis:             What did you expect would happen?

Materials:              What equipment & ingredients were needed?

Method:                 What did you do (step-by-step details)?

Results:                What did you find happened (give details of your observation)?

Discussion:             What conclusions can you draw from the experiment and why?

Conclusion:             Very briefly summarise your report!

References:             What information did you research and use to help you in your report?
                               Research Project – Chemistry Year 10 Extension Science

     The instructions are as follows:
     Wear SAFETY GOGGLES when conducting experiments. Wash and dry your hands before sitting back down at
     your work desk.
3.  Conduct at least two experiments – you may work with one partner.
4.  Collect and record your observations and numerical data.
5.  Write a balanced chemical equation for any observed chemical reaction.
6.  Tabulate the class numerical data in a systematic way so that it makes sense.
7.  Write one or more hypothesis that would appear to be true for the class data.
8.  Graph the appropriate pairs of variables. Clearly label the graphs with the independent variable on the horizontal axis (i.e.
    the X-axis) and similarly, the dependant variable on the vertical axis. Write a suitable heading for each graph.
9. Write a statement that either supports or negates your original hypothesis(s).
10. Write a conclusion that indicates what you believe is happening, and is supported by the experimentation.

Note: Each experiment is numbered and students will randomly select a number to obtain an instruction sheet. Each instruction
sheet will have a random number. Experiments will be done over two periods, thus enabling each student to complete at least
                                                           2
two experiments. All of the experiments will require a 1cm (1cm x 1cm) of zinc metal weighed accurately to 3 decimal places.
The zinc will need to be polished with steel wool to remove any foreign material or oxides prior to weighing and lightly re-
polished at the end of the reaction time.

Experiment 1.
     Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                      2


     Use a measuring cylinder to obtain 20mL of 0.5M Hydrochloric Acid solution and pour the contents into a 200mL
       conical flask.
     Place the conical flask into an ice bucket and record the lowest temperature.
     Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
       should be swirled gently initially and then each 10 minutes.
     Remove the zinc metal, wash under tap water and dry with paper toweling.
     Reweigh the zinc metal accurately to 3 decimal places.
     Calculate the loss in mass (if any) and the percentage loss of zinc metal.

Experiment 5.
     Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                      2


     Use a measuring cylinder to obtain 20mL of 1.0M Hydrochloric Acid solution and pour the contents into a 200mL
       conical flask.
     Place the conical flask into an ice bucket and record the lowest temperature.
     Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
       should be swirled gently initially and then each 10 minutes.
     Remove the zinc metal, wash under tap water and dry with paper toweling.
     Reweigh the zinc metal accurately to 3 decimal places.
     Calculate the loss in mass (if any) and the percentage loss of zinc metal.
Experiment 4.
     Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                      2


     Use a measuring cylinder to obtain 20mL of 2.0M Hydrochloric Acid solution and pour the contents into a 200mL
       conical flask.
     Place the conical flask into an ice bucket and record the lowest temperature.
     Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
       should be swirled gently initially and then each 10 minutes.
     Remove the zinc metal, wash under tap water and dry with paper toweling.
     Reweigh the zinc metal accurately to 3 decimal places.
     Calculate the loss in mass (if any) and the percentage loss of zinc metal.

Experiment 7.
     Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                      2


     Use a measuring cylinder to obtain 20mL of 0.5M Hydrochloric Acid solution and pour the contents into a 200mL
       conical flask.
     Place the conical flask into a water bath at 25 C.
                                                      o


     Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
       should be swirled gently initially and then each 10 minutes.
     Remove the zinc metal, wash under tap water and dry with paper toweling.
     Reweigh the zinc metal accurately to 3 decimal places.
     Calculate the loss in mass (if any) and the percentage loss of zinc metal.

Experiment 3.
     Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                      2


     Use a measuring cylinder to obtain 20mL of 1.0M Hydrochloric Acid solution and pour the contents into a 200mL
       conical flask.
     Place the conical flask into a water bath at 25 C.
                                                      o


     Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
       should be swirled gently initially and then each 10 minutes.
     Remove the zinc metal, wash under tap water and dry with paper toweling.
     Reweigh the zinc metal accurately to 3 decimal places.
     Calculate the loss in mass (if any) and the percentage loss of zinc metal.

Experiment 9.
     Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                      2


     Use a measuring cylinder to obtain 20mL of 2.0M Hydrochloric Acid solution and pour the contents into a 200mL
       conical flask.
     Place the conical flask into a water bath at 25 C.
                                                      o


     Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
       should be swirled gently initially and then each 10 minutes.
     Remove the zinc metal, wash under tap water and dry with paper toweling.
     Reweigh the zinc metal accurately to 3 decimal places.
     Calculate the loss in mass (if any) and the percentage loss of zinc metal.
   Experiment 2.
        Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                         2


        Use a measuring cylinder to obtain 20mL of 0.5M Hydrochloric Acid solution and pour the contents into a 200mL
          conical flask.
        Place the conical flask into a water bath at 60 C.
                                                         o


        Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
          should be swirled gently initially and then each 10 minutes.
        Remove the zinc metal, wash under tap water and dry with paper toweling.
        Reweigh the zinc metal accurately to 3 decimal places.
        Calculate the loss in mass (if any) and the percentage loss of zinc metal.



   Experiment 8.
        Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                         2


        Use a measuring cylinder to obtain 20mL of 1.0M Hydrochloric Acid solution and pour the contents into a 200mL
          conical flask.
        Place the conical flask into a water bath at 60 C.
                                                         o


        Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
          should be swirled gently initially and then each 10 minutes.
        Remove the zinc metal, wash under tap water and dry with paper toweling.
        Reweigh the zinc metal accurately to 3 decimal places.
        Calculate the loss in mass (if any) and the percentage loss of zinc metal.

   Experiment 6.
        Weigh a 1cm piece of sheet zinc metal (note the instructions above first).
                         2


        Use a measuring cylinder to obtain 20mL of 2.0M Hydrochloric Acid solution and pour the contents into a 200mL
          conical flask.
        Place the conical flask into a water bath at 60 C.
                                                         o


        Remove the thermometer and add the zinc metal. Allow any chemical reaction to proceed for one (1) hour. The flask
          should be swirled gently initially and then each 10 minutes.
        Remove the zinc metal, wash under tap water and dry with paper toweling.
        Reweigh the zinc metal accurately to 3 decimal places.
        Calculate the loss in mass (if any) and the percentage loss of zinc metal.




Summary

   1.   The experiment numbers will need to be properly randomized and on separate small sheets.
   2.   We have 3 concentrations and 3 temperatures (3 x 3) matrix for final data sheet. The students will only have the
        randomized class data – no specific order.
             Research Project Master Data Sheet (masses of 1cm2 zinc sheets before and after 30 minutes in HCL)

Experiment                   Trial 1        Trial 2        Trial 3         Trial 4        Trial 5            Average %
                                                                                                             difference

1            Before

0.5 M        After

Low          Difference

5            Before

1.0 M        After
Low
             Difference

2            Before

0.5 M        After

High         Difference

7            Before

0.5 M        After

Medium       Difference

3            Before

1.0 M        After

Medium       Difference

9            Before

2.0 M        After

Medium       Difference

8            Before

1.0 M        After

High         Difference

6            Before

2.0 M        After
High
             Difference

4            Before

2.0 M        After

Low          Difference
                         Assessment Rubric for Extended Science Lab Report
CATEGORY                      4                               3                                2                             1
                                                        Report Sections
                The purpose of the lab or        The purpose of the lab or       The purpose of the lab or       The purpose of the lab or
                the question to be answered      the question to be answered     the question to be answered     the question to be
                during the lab is clearly        during the lab is identified,   during the lab is partially     answered during the lab
    Aim         identified and stated.           but is stated in a somewhat     identified, and is somewhat     is erroneous or irrelevant,
                Including an accurate and        unclear manner. Including a     unclear. Includes an attempt    including no or poor
                detailed balanced equation       balanced equation for the       to describe of the chemical     attempt to describe the
                for the reaction                 reaction                        reaction in symbols.            chemical reaction.
                Hypothesised relationship        Hypothesised relationship       Hypothesised relationship   No hypothesis has been
                between the variables and        between the variables and       between the variables and stated.
                the predicted results is clear   the predicted results is        the predicted results has
Hypothesis      and reasonable based on          reasonable based on             been stated, but appears to
                what has been studied.           general knowledge and           be based on flawed logic.
                                                 observations.
                All materials and setup used Almost all materials and the        Most of the materials and       Many materials are
                in the experiment are clearly setup used in the                  the setup used in the           described inaccurately
 Materials      and accurately described.     experiment are clearly and         experiment are accurately       OR are not described at
                                              accurately described.              described.                      all.
                Procedures are listed in         Procedures are listed in a   Procedures are listed but          Procedures do not
                clear steps. Each step is        logical order, but steps are are not in a logical order or      accurately list the steps
  Method        numbered and is a complete       not numbered and/or are not are difficult to follow.            of the experiment.
                sentence.                        in complete sentences.
                Professional looking and         Accurate representation of      Accurate representation of      Data are not shown OR
                accurate representation of       the data in tables and/or       the data in written form, but   are inaccurate.
  Results       the data in tables and           graphs. Graphs and/or           no graphs or tables are
                graphs. Graphs and tables        tables are labelled and         presented.
                are labelled and titled.         titled.
                The relationship between         The relationship between        The relationship between   The relationship between
                the variables is discussed       the variables is discussed      the variables is discussed the variables is not
                and trends/patterns logically    and trends/patterns logically   but no patterns, trends or discussed.
                analysed. Predictions are        analysed.                       predictions are made based
Discussion      made about what might                                            on the data.
                happen if part of the lab
                were changed or how the
                experimental design could
                be changed.
                Conclusion includes              Conclusion includes             Conclusion includes what        No conclusion was
                whether the findings             whether the findings            was learned from the            included in the report OR
                supported the hypothesis,        supported the hypothesis        experiment.                     shows little effort and
Conclusion      possible sources of error,       and what was learned from                                       reflection.
                and what was learned from        the experiment.
                the experiment.
                Several reputable                A few reputable background      A few background sources        Material is directly copied
                background sources were          sources are used and cited      are used and cited correctly,   rather than put into
References      used and cited correctly.        correctly. Material is          but some are not reputable      students own words
                Material is translated into      translated into student's own   sources. Material is edited     and/or sources are cited
                student's own words.             words.                          somewhat by students.           incorrectly.
                                                        Overall Criteria
                Used time well in lab and        Used time pretty well.       Did the lab but did not            Participation was minimal
                focused attention on the         Stayed focused on the        appear very interested.            OR student was hostile
Participation   experiment.                      experiment most of the time. Focus was lost on several          about participating.
                                                                              occasions.
                Report illustrates an            Report illustrates an           Report illustrates a limited Report illustrates
                accurate and thorough            accurate understanding of       understanding of scientific  inaccurate understanding
 Scientific     understanding of scientific      most scientific concepts        concepts underlying the lab. of scientific concepts
 Concepts       concepts underlying the lab.     underlying the lab.                                          underlying the lab.

				
DOCUMENT INFO
Description: A Year 10 group of students who elected to do an extension class in semester 2 attempted this small project. They found the analysis of the class results challenging because the trends were initially hidden in the random tabulation of the results. Graphs were mostly done using Microsoft Excel.