Virtual lab Electrochem January 18, 2018 Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions

January 18, 2018 Do Now (4 min) Learning Target: I can Use a virtual lab to determine the endpoint of redox titrations based on half reactions Do Now: Complete the FIFTH question on your MC DO NOW SHEET Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions

January 18, 2018 Review: Do Now The question below refers to the reactions represented below, which are involved in a demonstration commonly known as “underwater fireworks.” Reaction 1: CaC2 (s) + 2 H2O (l)  C2H2 (g) + Ca(OH)2 (s) Reaction 2: NaOCl (aq) + 2 HCl (aq)  Cl2 (g) + NaCl (aq) + H2O (l) Reaction 3: C2H2 (g) + Cl2 (g)  C2H2Cl2 (g) Ca(OH)2 (s) precipitates when a 1.0 g samples of CaC2 (s) is added to 1.0 L of distilled water at room temperature. If a 0.064 g sample of CaC2 (s) (molar mass 64 g/mol) is used instead and all of it reacts, which of the following will occur and why? (The value of Ksp for Ca(OH)2 is 8.0 x 10-8. ) Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions

Review: Do Now Ca(OH)2 will precipitate because Q > Ksp January 18, 2018 Review: Do Now Options Why is each option partially right? Choose the most correct answer, and why Ca(OH)2 will precipitate because Q > Ksp   Ca(OH)2 will precipitate because Q < Ksp Ca(OH)2 will not precipitate because Q > Ksp Ca(OH)2 will not precipitate because Q < Ksp Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions

Manganate (VII) / Fe2+ titration January 18, 2018 Manganate (VII) / Fe2+ titration 1. Given that aqueous manganate(VII) (permanganate) ions will be converted to Mn2+(aq) ions in acid solution, write a half equation to summarize this process. Write a half equation to summarize the conversion of Fe2+(aq) to Fe3+(aq). Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions

Manganate (VII) / Fe2+ titration January 18, 2018 Manganate (VII) / Fe2+ titration 3. Combine the equations in #1 and #2 above to form a complete REDOX equation, and clearly identify the oxidizing agent and the reducing agent. Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions

January 18, 2018 Virtual Lab (50 min) Independently, complete the lab. Use the website url to access the virtual lab and complete each section as you come across it. Due today! Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions

Summary What Did you see? January 18, 2018 Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions

January 18, 2018 Exit ticket (3 min) On a separate sheet of paper: What is the difference between an acid base titration and a redox titration? Learning Target: I CAN Use a virtual lab to determine the endpoint of redox titrations based on half reactions