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METAL ACTIVITY Prof. Cristina Comaniciu

METAL ACTIVITY Prof. Cristina Comaniciu. Introductory section and preparatory phase. Short Description: Students will utilize a virtual lab setting to research and report on metal activity. Specific elements covered are as follows: Mg, Ca, Fe, Cu, Ag, Zn, Pb

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METAL ACTIVITY Prof. Cristina Comaniciu

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  1. METAL ACTIVITY Prof. Cristina Comaniciu

  2. Introductory section and preparatory phase • Short Description: Students will utilize a virtual lab setting to research and report on metal activity. Specific elements covered are as follows: Mg, Ca, Fe, Cu, Ag, Zn, Pb • Keywords: metal reactivity, activity series • Target audience: teacher with students • Age range: 15-16 • Context: Chemistry class • Time required: 100 min

  3. Introductory section and preparatory phase • Technical Requirements: PPT presentation, web site, resource and supplement materials • Author’s background: Chemistry teacher • Connection with the curriculum: Chemistry curriculum IX

  4. Learning Objectives: At the end of the lesson students should be able to:                 O1 To identify the chemical properties of metals;                 O2 To carried out laboratory experiments to determine the chemical reactivity of metals                 O3 To correctly write equations chemical reactions that illustrate different reactivity of metals                 O4 To correlate different chemical properties of metals with their position in the periodic table of elements and their uses; • Guidance for preparation: Use the following website to research and report on metal activity. The website given will provide you with a virtual experience in regards to metals, their activities, and the ways that they interact.

  5. Teaching Phase 1: Question Eliciting ActivitiesPROVOKE CURIOSITY Metals are all over. Our appliances at our houses, the furniture in our workplaces, and the other structures that we see every time we go outside, all those things are entirely or partially made of metal. This just goes to show how big of a part metals play in our daily life. A metal is an element that readily loses electrons to form positively charged ions known as cations. Metals can form ionic bonds with non-metallic elements.

  6. Teaching Phase 1: Questions Eliciting Activities DEFINE QUESTIONS FROM CURRENT KNOWLEDGE • Why nitric acid is transported in tanks made ​​of aluminum?Why iron is used only in the form of alloys?Why copper vessels covered with a thin layer of tin?Why is aluminum used for obtaining other metals (aluminothermic)?Why are some items of iron covers with thin layers of zinc, tin, chromium, nickel, gold?What treasures are made of gold, silver, platinum?Why do iron rust?

  7. Teaching Phase 2: Active Investigation PROPOSE PRELIMINARY EXPLANATIONS OR HYPOTHESES Activity Series The relative reactivity of metals can be used to organize them into an activity series. Once organized, an activity series helps us to predict if a reaction will occur when a piece of elemental metal is placed in water, an acid solution, or a solution containing the ion of another metal. Activity series are generally listed in order of decreasing reactivity. This means that in a metal activity series we would find the most reactive metals at the top. Only a few of the most reactive metals are able to displace hydrogen from water while a larger number will displace H+ from an acid. The least reactive metals are not able to displace hydrogen from either of these and are therefore found at the bottom of the series.

  8. Organizing the metals in this fashion also allows us to predict how the metals will react with each other. In a solution or compound, an elemental metal will displace any metal lower than it on the activity series. An Example Activity Series Organizing the metals in this fashion also allows us to predict how the metals will react with each other. In a solution or compound, an elemental metal will displace any metal lower than it on the activity series. An Example Activity Series

  9. Teaching Phase 2: Active InvestigationPLAN AND CONTACT SIMPLE INVESTIGATION Answer the following questions and write the equations (molecular and net ionic) for all reactions that occur. • Will sodium metal react with water? • Does nickel react with water? with HCl? with a tin nitrate solution? • c. Will gold react with a nickel nitrate solution? d. Will tin react with water? with a gold chloride solution? • e. List the four ways we can identify that a chemical reaction has occurred.

  10. Teaching Phase 3: CreationGATHER EVIDENCE FROM OBSERVATION http://www.harpercollege.edu/tm-ps/chm/100/dgodambe/thedisk/series/3perform.htm In this experiment students will perform a series of tests to establish an activity series for several metals.

  11. Teaching Phase 4: DiscussionEXPLANATION BASED ON EVIDENCE Students work in groups. They correct equations for all reactions that occur and order the metals. They order the metals in activity series.

  12. Teaching Phase 4: DiscussionCONSIDER OTHER EXPLANATIONS

  13. Teaching Phase 5: ReflectionCOMMUNICATE EXPLANATION Students will create an activity series for the seven metals in this experiment by listing them from most reactive (at the top) to least reactive (at the bottom).

  14. FOLLOW UP ACTIVITIES AND MATERIALS http://www.harpercollege.edu/tm-ps/chm/100/dgodambe/thedisk/series/3postlab.htm

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