Name:__________________ ____________________________________Date:________Hour:___________Types of Chemical Reactions POGIL Do atoms rearrange in predictable patters during chemical reactions? Why? Recognizing patterns allows us to predict future behavior. Weather experts use patterns to predict dangerous storms so people can get their families to safety. Political analysts use patterns to predict election outcomes. Similarly, chemists classify chemical equations according to their patterns to help predict products of unknown but similar chemical reactions. 1. Match each description below to one of the reactions sets (A, B, C, or D) from Model 1. _______________ Ionic compounds dissolved in water switch partners. _______________ One compound breaks into elements or smaller compounds _______________ Two or more elements or compounds combine to form one product. _______________ Part of an ionic compound is removed and replaced by a new element. 2. Define the following terms as they are commonly used in the English language: a. Synthesis: b. Decomposition: c. Replacement: 3.The four sets of chemical reactions shown in Model 1 have the following general names. Discuss within your group which name belongs to which set of chemical reactions. Write the name in the appropriate place in Model 1. Single Replacement Reaction Synthesis Reaction describe what is happening chemically. 5.Represent the drama of Adam and Barbara as a chemical equation. They end up holding hands the entire dance. The Dance… Adam and Barbara were both single. I’d like you to think about their similarity to dancing (yes.If X and Y represent elements.Represent the drama of Xavier and Yasmine as a chemical equation. 7.What would you classify reaction between X and Y the terms question type of reaction is represented in the . After that fateful meeting. Use A to represent Adam and B to represent Barbara. have a heated quarrel and break up.If A and B represent elements.Name:__________________ ____________________________________Date:________Hour:___________ Double Replacement Reaction Decomposition Reaction *Stop here and wait for further instructions from your teacher.How would you classify the reaction between A and B using the terms from question 3? The Dance Continues… Later that same evening. Model 2: Analogy—Dancing with Reactants When you are thinking about the four different types of reactions. They both go to the dance alone.How the using from 3? 10. I’ll show you what I mean. no one ever sees Adam without Barbara. who have been “the couple” forever. dancing). 6. describe what is happening chemically. Use X to represent Xavier and Y to represent Yasmine. 9. they are forever referred to as “Adam and Barbara.” Key Questions 4. However. Xavier and Yasmine. they meet at just the perfect time when a song they both adore is playing. 8. No one was talking about “Adam and Barbara” being together before the dance. Summarize the reaction. After everyone agrees to stop quarreling. 11.Write a chemical reaction for this scenario. 12. Xavier and Barbara decided that they will dance together. . The Dance Continues… In their blissful state.What type of reaction does this scenario represent? (Based on the New Concepts words). Adam asks Yasmine to dance.Represent Adam and Barbara’s attempt to reconcile Xavier and Yasmine’s differences as a chemical equation. too. 13. Adam and Barbara (AB) try to help Xavier and Yasmine (XY) reconcile their differences.Name:__________________ ____________________________________Date:________Hour:___________ picture below (the terms in question 3)? Write your own analogy for the reaction illustrated in the picture. 14. Name:__________________ ____________________________________Date:________Hour:___________ Model 3: Types of Reactions 15.Compare/contrast a single replacement reaction to a double replacement reaction. or double replacement (DR). single replacement (SR). .Identify each of the reactions below as synthesis (S). decomposition (D). As shown in Model 3. 18. list the number of reactants and the number of products found in the synthesis reaction. 17. As shown in Model 3. list the number of reactants and the number of products found in a decomposition reaction. 16. What reactant is common in all of the combustion reactions in Model 3? 21. Describe the error made by the first student. Use complete sentences in each answer.A student writes the following incorrect chemical equation for the synthesis of magnesium oxide. Mg + O MgO a.Name:__________________ ____________________________________Date:________Hour:___________ Model 3: Combustion Reactions 19. 23. 22. What are the products in all of the combustion reactions in Model 3? 20. Using the examples in Model 3. What is the correct formula for magnesium oxide? Hint: What type of compound is magnesium oxide? b. d. For each type of the reaction types in Model 1. . Write the correct balanced chemical equation for the synthesis of magnesium oxide. The “fuel” in most combustion reactions is a hydrocarbon. explain why a combustion reaction CANNOT be classified as that type. Mg + O2 MgO2 Another student writes the following incorrect synthesis reaction of magnesium oxide. write a description for the classification of substances known as hydrocarbons. What is the correct formula for elemental oxygen? c. What is wrong with the chemical formula(s) of the product(s) predicted by this student? b. FeBr3 (aq) + NaOH (aq) FeOH (s) + NaBr3 (aq) a. Write the correct equation for the double replacement reaction between iron (III) bromide and sodium hydroxide. In a single replacement reaction.Name:__________________ ____________________________________Date:________Hour:___________ 24. What element will fluorine replace in lithium bromide? Hint: What is the most common ionic form of fluorine? b. Write the correct balanced equation for the single replacement reaction between lithium bromide and fluorine. What is wrong with the student’s prediction of the products in the above reaction? c. part of an ionic compound is removed and replaced by a new element. 2LiBr (aq) + F2 (g) 2Li (s) + 2FBr (g) a. . A student writes the following incorrect chemical equation for a single replacement reaction between lithium bromide and fluorine. 25. A student writes the following incorrect chemical equation for a double replacement reaction between iron (III) bromide and sodium hydroxide solutions.
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