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Chemical Reactions

Chemical Reactions. Chemical Reactions Study Guide. Chpt. 9.4 Acids and Bases Chpt. 11: Balancing, Classifying, and Predicting Chemical Reactions Chapter 17.1 : Thermochemistry (pg. 505-506) Chpt. 18.1: Reaction Rates. Chemistry (2/25). Acid/Base Quiz

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Chemical Reactions

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  1. Chemical Reactions

  2. Chemical Reactions Study Guide Chpt. 9.4 Acids and Bases Chpt. 11: Balancing, Classifying, and Predicting Chemical Reactions Chapter 17.1: Thermochemistry (pg. 505-506) Chpt. 18.1: Reaction Rates

  3. Chemistry (2/25) • Acid/Base Quiz • Interpreting and Balancing chemical equations Due: • Acid/Base Nomenclature worksheet for partial credit

  4. Chemical Reactions Objectives 1.Classify and name compounds in chemical reactions 2.Describe chemical reactions in word and chemicalequations. 3.Balance chemical equations based on the Law of Conservation of Mass. 4.Identify and classify types of chemical reactions and energy changes involved. 5.Predictproducts and energy changes in a chemical reaction. 6.Identify and testfactors that affect the rate of chemical reactions.

  5. Chemistry (2/26) Infinite Campus Update: • Acid/Base Nomenclature Worksheet (10pts.) • Acid/Base Quiz (15pts.) *Check infinite a lot of missing assignments!* Objectives: • Interpreting and Balancing chemical equations Homework: • Check for missing assignments on infinite campus • Balancing chemical equations worksheet

  6. Chemical Reaction Pre-Test • What is a chemical reaction? • If matter is conserved during a chemical reaction, how is it new matter is “created”? 3. Complete the questions below on the following word equation: Fe(s) + O2 (g) ----> FeO (s) • Give an example of a reactant from this reaction. • Give an example of a product from this reaction. • Balance the chemical equation if needed. • Circle the type of chemical reaction you think this represents. synthesis decomposition replacement neutralization combustion

  7. Chemical Reactions Substances chemically interact to form different substances. A substance can be an element or a compound. Chemical bonds are broken and created. Example: Fe(s) + O2 (g) ----> FeO (s)

  8. Chemical Equations Fe + O2 ------> FeO Reactants: Starting substances. Chemically interact with one another. Usually located to the left of the arrow. Products: Ending substances. Substances formed from the chemical reaction. Usually located to the right of the arrow.

  9. Chemical Equations Fe(s) + O2 (g) ------> FeO (s) Abbreviations for state of matter in an equation. (s)= substance in solid state (g)= substance in gaseous state (l)= substance in liquid state (aq)= substance dissovled in water. (aqueous solution)

  10. Law of Conservation of Mass Fe(s) + O2 (g) ------> FeO (s) • Are atoms destroyed or created during a chemical reaction? • No, they are just rearranged to produce new substances.

  11. Law of Conservation Of Mass Matter is not created or destroyed. Matter is just rearranged. (mass of reactants = mass of products) That is why it is important to balance chemical equations.

  12. Law of Conservation of Mass Fe(s) + O2 (g) ------> FeO (s)

  13. Balancing Chemical Equations Why? Observe the Law of Conservation of Mass Rules: 1. Add coefficients in front of substances, do NOT change subscripts. 2. First balance elements that only appear once on each side of the equation. 3. Make sure coefficients are expressed in lowest terms.

  14. Chemistry (2/27) Objectives: • Interpreting and Balancing chemical equations • Review acid/base quiz Homework: • Balancing equations worksheet(due Thursday) • Law of Conservation of Mass pre-lab qts. and hypothesis • Review acids/bases nomenclature • Check for missing assignments in infinite campus Lab: Law of Conservation of Mass Lab: (Thursday)

  15. Law of Conservation of Mass Lab Homework: • Read through the background and procedures section. • Complete pre-lab questions and hypothesis.

  16. Balancing Chemical Equations a. K + MgCl2 ---------> KCl + Mg b. Ag2O ---------> Ag + O2 c. CH4 + O2 -------> CO2 + H2O

  17. Chemical Equations

  18. Chemistry (2/28) Objectives: • Interpreting and Balancing Chemical Equations • Validate the Law of Conservation of Mass with scientific evidence. Due Today: • Balancing chemical equations worksheet (turn in tray) • Law of Conservation of Mass pre-lab qts. and hypothesis Homework: • Balancing Chemical Equations practice problems (Fri.) • Check for missing assignments in infinite campus

  19. Balancing Chemical Equations Dihydrogen monoxide + sodium (bicarbonate) ---> carbon dioxide + sodium hydroxide + dihydrogen monoxide

  20. Law of Conservation of Mass Lab Purpose: Validate the Law of Conservation of Mass Lab Reminders: • Follow ALL lab procedures carefully. • Use the same balance for all measurements.

  21. Acid/Base Nomenclature Quiz

  22. Chemistry (3/4) Infinite Campus Update: • Conservation of Mass Lab (12pts.) • Balancing Chemical Equations (10pts) Objectives: • Balancing Chemical Equation Quiz • Classifying Chemical Reactions • Discuss Law of Conservation of Mass Lab Homework: (Due Wed.) • Balancing Chemical Equations Worksheet • Classifying Chemical Reactions Worksheets

  23. Chemical Reactions Objectives Identify and classify types of chemical reactions. 2. Identify energy changes involved with chemical reactions. 3. Predict products and energy changes in a chemical reaction.

  24. Chemistry (3/6) Infinite Campus Update: • Balancing Chemical Equations Quiz (14pts.) Due Today: • Balancing Chemical Equation Worksheet (10pts.) Objectives: • Classifying Chemical Reactions • Identify energy changes associated with chemical reactions • Discuss Balancing Chemical Equation Quiz Homework: (Due Wed.) • Classifying Chemical Reactions Worksheets • Chemical Reaction Lab (pre-lab qts.)

  25. Chemistry (3/6) Infinite Campus Update: • Balancing Chemical Equations Quiz (14pts.) Objectives: • Address qts. over Balancing Chemical Equation Quiz • Address qts. over Balancing and Classifying wks (homework) • Discuss Neutralization Reaction • Introduce Chemical Reaction Lab Homework: (Due Wed.) • Chemical Reaction Lab (pre-lab qts.)

  26. Chemical Reaction Lab Purpose: To perform and observe eight chemical reactions in the lab. Homework: Read the introduction, background, and procedures section; then answer the pre-lab questions on the front. (1-9)

  27. Balancing Chemical Equation Quiz

  28. Types of Chemical Reactions 1. Synthesis (R+ S ----> RS) 2. Decomposition (RS------> R+ S) 3. Single Replacement (T+ RS ---> TS + R) 4. Double Replacement (R+S- + T+U- ---> R+U-+ T+S-) 5. Combustion (CxHx + O2 ----> CO2 + H2O) 6. Neutralization (Acid + Base--> H2O + Salt) (type of double replacement reaction)

  29. Synthesis (Combination) Reaction • 2 or more substances chemically combine to form a single substance. • R+ S ----> RS + energy • More energy is released at the end of the reaction then is needed to start the reaction. (energy released by surroundings > energy absorbed by system)

  30. Decomposition Reaction A compound breaks down into simpler substances. RS + energy ----> R + S More energy is required to start the reaction then is released at the end of the reaction. (energy absorbed by system > energy released to surroundings) .

  31. Single Replacement Reaction An element replaces another element in a compound. T+ RS ---> TS + R + energy Usually energy of surrounding > energy of system

  32. Double Replacement Reaction • Exchange of cations between two ionic compounds. • R+S- + T+U- ---> R+U-+ T+S- + energy • Usually energy of surrounding > energy of system

  33. Combustion Reaction Fuel (CHO) reacts with oxygen to produce predictable substances and energy. CxHx(Ox) + O2 ----> CO2 + H2O + ENERGY Always energy of surroundings > energy of system

  34. Neutralization An acid and a base react to produce predictable products. Changes the pH to 7 (neutral). Acid + Base -------> H2O + Salt(ionic compounds) Salt: The cation comes from the base and the anion from the acid. Ex. Na(OH) + HCl NaCl + H2O

  35. Chemistry (3/11) Due: • Classifying and Balancing Chemical Equations wksht • Pre-lab questions(1-9) from Chemical Reaction Lab Objectives: • Chemical Reaction Lab Homework: • Turn in 3rd qtr. missing assignments for partial credit. (Deadline: Wed. 3/13)

  36. Chemical Equations to Lab Write the reactants for each reaction, and then predict what type of reaction you think you are going to observe. Mg + O2 ------> Mg + HCl ----> (NH4)2(CO3) -----> Ca(CO3) + HCl ----> Zn + CuCl2 ----> CuCl2 + Na3(PO4) ---> HCl + Na(OH) ----> C2H6O + O2 ----->

  37. Chemical Reaction Lab (3/11) Purpose: • Predict the type of reaction for each experiment. • Perform, observe, and record data for each chemical reaction.

  38. Chemistry (3/12) Infinite Campus Update: • Classifying and Balancing Chemical Rxtns. (10pts.) Objective: • Chemical Reaction Lab Homework: • Balancing reactions and establishing a conclusion for the lab.

  39. Chemical Reaction Lab (3/12) Purpose: • Complete chemical reaction lab. • Predict products of each reaction. • Balance each chemical reaction.

  40. Chemistry (3/13) Objectives • Predict products of each reaction from the lab • Balance equations(if needed) and establish conclusion for lab. Homework: • Complete chemical reaction lab

  41. Chemical Equations to Lab Predict the products of each reactant. • Mg + O2 ------> MgO • Mg + HCl ----> • (NH4)2(CO3) -----> NH3 + CO2 + H2O • Ca(CO3) + HCl ----> CaCl2 + H2O + CO2 • Zn + CuCl2 ----> • CuCl2 + Na3(PO4) ---> • HCl + Na(OH) ----> • C2H6O + O2 ----->

  42. Chemical Equations to Lab Just need to check and see if they are balanced. • Mg + O2 ------> MgO • Mg + HCl ----> MgCl + H2 • (NH4)2(CO3) -----> NH3 + CO2 + H2O • Ca(CO3) + HCl ----> CaCl2 + H2O + CO2 • Zn + CuCl2 ----> ZnCl2 + Cu • CuCl2 + Na3(PO4) ---> Cu3(PO4)2 + NaCl • HCl + Na(OH) ----> H2O + NaCl • C2H6O + O2 -----> CO2 + H2O

  43. Conclusion A summary that includes the following: Identify and explain which reactions from the lab were synthesis, decomposition, single replacement, double replacement, neutralization, combustion. Based on the data section explain which reactions were exothermic and endothermic. Which reaction(s) did you like the best and why? What did you learn from this lab? (be specific)

  44. Chemistry (3/14) Due Today: • Chemical Reaction Lab Objectives: • Classifying reactions • Predicting products • Balancing chemical equations Homework: • Predicting products and balancing equations wks.

  45. (Chemistry 3/15) Infinite Campus: *Chemical Reaction Lab (26pts. )-3rd qtr.* Objectives: • Classify reactions • Predict products • Balance Chemical Equations Homework: • Complete Predicting Products Worksheet. • Complete internet enrichment problems. Monday: Quiz over chemical reactions. Study!

  46. Chemical Reactions Predict the products for each reaction and balance if needed. • 3Ca + N2 --------> Ca3N2 (synthesis) b. Cu2S -------> 2Cu + S (decomposition) • 2NaBr + F2 ------> 2NaF + Br2 (single replace) • CH4 + 2O2 -----> CO2 + 2H2O (combustion) e. H2(CO3) + 2K(OH) -----> K2(CO3) + 2H2O (neutralization)

  47. Chemistry (3/18) Objectives: • Classifying, Balancing, Predicting Products • Activity Series Table and Single Replacement Homework: • Activity Series Pre-Lab reading and hypothesis • Chemical Reaction Quiz (Wednesday) • Work on study guide (Test Monday)

  48. Chemical Reactions: Bell Ringer What are the coefficients that will balance the chemical equation below? AlCl3 + Na(OH) ----> Al(OH)3 + NaCl 1,3,1,3 3,1,3,1 1,1,1,3 1,3,3,1 What type of chemical reaction is expressed above? Predict the product(s) and balance if needed: Ba (s) + O2 (g) ---------->

  49. Predicting Products

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