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Differentiating Reaction Types

Differentiating Reaction Types. Classifying Chemical Reactions. January 6, 2014. Objective: SWBAT identify and classify reactions as synthesis, decomposition, single replacement or double replacement reactions by using relationships before and after the yield symbol.

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Differentiating Reaction Types

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  1. Differentiating Reaction Types Classifying Chemical Reactions

  2. January 6, 2014 • Objective: SWBAT identify and classify reactions as synthesis, decomposition, single replacement or double replacement reactions by using relationships before and after the yield symbol. • Do Now:1. Calculate how many mole of sodium chloride are in 33.2 g of NaCl. 2. Calculate the mass of 2.2 moles of LiBr. • Homework: Read pages 65-74 in your workbook. Complete #’s 1-16.

  3. Guided Notes • Introduction to the Chemical Reaction: • A + B  C + D • Chemical reactions show how certain elements and compounds change chemically into new element and compound combinations. • The most important principle of the chemical reaction is the conservation of matter, which means you will have the same number of elements before and after a reaction just different orientations. • The yield symbol () separates before the reaction happens, and after the reaction happens. Consider it as an = sign. • The elements and compounds before the () are called reactants. • The elements and compounds after the () are called the products. • There are four types of chemical reactions: synthesis, decomposition, single replacement, double replacement. You can differentiate them by looking at patterns before and after the ().

  4. Guided Classification Single Replacement: A + BC  B + AC Synthesis: A + B  AB Decomposition: AB  A + B Double Replacement: AD + BC  BD + AC

  5. Guided Practice Classify the following reactions using the patterns of each type: N2(g) + H2(g)  2NH3(g) Pb(NO3)2(aq) + NaCl(aq)  NaNO3(aq) + PbCl2(s) Li(s) + 2H2O(l)  LiOH(aq) + H2(g)

  6. Independent Practice • Activity A: Identify the following reactions. State your Evidence in the third column. Prepare to share and provide feedback to your elbow partner • You have 5 minutes to complete the five classifications on your own. Think about your evidence. • You will have 2 minutes to share with an elbow partner to confirm. • We will share for 2 minutes.

  7. Independent Practice • Activity B:Predict the missing reagent based off of the information provided in the problem. Justify your response. Don’t forget to criss-cross for a correct formula. • You have 5 minutes to complete the four problems on your own. Think about your evidence. • You will have 2 minutes to share with an elbow partner to confirm. • We will share for 2 minutes.

  8. Independent Practice • Activity C:Write the chemical equations from the words provided. Use reference table E, S, and the Periodic table to help you finish. Classify the reaction. • You have 5 minutes to complete the five problems on your own. Think about your evidence. • You will have 2 minutes to share with an elbow partner to confirm. • We will share for 2 minutes.

  9. EPAS 1.) Classify the following 2 reactions: a.) Mg(OH)2 + 2HNO3  Mg(NO3)2 + 2HOH b.) 2NaHCO3 + Heat  Na2CO3 + H2O + CO2 2.) Determine the missing reagent: 2Al2S3 4_____ + 6S

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