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Exercise 1: Esterification Note aroma before and after boiling Structure and IUPAC name of product fo Reaction Mixture A. 10 drops CHsCOOH+10 drops octanol + 2 drops concentrated H2S04 (catalyst) 8. 10 drops CH,COOH+ 10 dropspentanolo he ale + 2 drops concentrated H2504 (catalyst) C. 1 pinch salicylic acid + 10 drops methanol + 2 drops concentrated H SO4 (catalyst) test tube. Put the first tube in a beaker of boiling water for 5 min. Pour * Prepare mixture in a contents of the tube into a beaker with 50mL distilled H,O. Waft vapor towards you to observe smel 1. Write a balanced chemical equation for each reaction showing expanded chemical formulas. C. 2. If you mixed 10 drops of ethanol and 10 drops of CHaCOOH, calculate the theoretical mass in grams of the ester formed in the reaction. Show all calculation steps. Assume the following 20 drops-1 mL Density of ethanol:0.90 g/mL [CH3COOH-17.4 M Exercise 2: Saponification (Refer to a separate handout for instructions) Questions 2. What is the purpose of adding saturated NaCi to the reaction mixture? nnl 2. Describe the pH, appearance and sudsing ability of the soap after 24 hours. 3. Write the chemical equation for the saponification reaction, showing the structures of the reactants and products. Exercise 3: Oxidation-Reduction (Redox) Reaction mixture Observations 5 drops H:0+5 drops Tollen's reagent 5 drops glucose+ 5 drops Tollen's reagent Prepare mixture in a clear glass ornament, cover tightly with parafilm, and swirl continuously for 2 m ""Use the same ornament for the second mixture; cover with parafilm and swirl vigorously for 2 minutes. 5 drops H20+ 5 drops Benedict's reagentu 5 drops fructose + 5 drops Benedict's reagenthin enongi 5 drops glucose + 5 drops Benedict's eagentellor theongrd et lode ho **Prepare each mixture in a labeled test tube and put the tubes in a beaker of boiling water for 5 minutes. Note color change and time of reaction. Discard contents into the designated waste container. C4 Questionss t 1. What is the visible observation for a positive Tollen's test? a positive Benedict's test? 2. Write the chemical equation for the positive reaction, showing the structures of the reactants and products. Show transcribed image text
Exercise 1: Esterification Note aroma before and after boiling Structure and IUPAC name of product fo Reaction Mixture A. 10 drops CHsCOOH+10 drops octanol + 2 drops concentrated H2S04 (catalyst) 8. 10 drops CH,COOH+ 10 dropspentanolo he ale + 2 drops concentrated H2504 (catalyst) C. 1 pinch salicylic acid + 10 drops methanol + 2 drops concentrated H SO4 (catalyst) test tube. Put the first tube in a beaker of boiling water for 5 min. Pour * Prepare mixture in a contents of the tube into a beaker with 50mL distilled H,O. Waft vapor towards you to observe smel 1. Write a balanced chemical equation for each reaction showing expanded chemical formulas. C. 2. If you mixed 10 drops of ethanol and 10 drops of CHaCOOH, calculate the theoretical mass in grams of the ester formed in the reaction. Show all calculation steps. Assume the following 20 drops-1 mL Density of ethanol:0.90 g/mL [CH3COOH-17.4 M
Exercise 2: Saponification (Refer to a separate handout for instructions) Questions 2. What is the purpose of adding saturated NaCi to the reaction mixture? nnl 2. Describe the pH, appearance and sudsing ability of the soap after 24 hours. 3. Write the chemical equation for the saponification reaction, showing the structures of the reactants and products. Exercise 3: Oxidation-Reduction (Redox) Reaction mixture Observations 5 drops H:0+5 drops Tollen's reagent 5 drops glucose+ 5 drops Tollen's reagent Prepare mixture in a clear glass ornament, cover tightly with parafilm, and swirl continuously for 2 m ""Use the same ornament for the second mixture; cover with parafilm and swirl vigorously for 2 minutes. 5 drops H20+ 5 drops Benedict's reagentu 5 drops fructose + 5 drops Benedict's reagenthin enongi 5 drops glucose + 5 drops Benedict's eagentellor theongrd et lode ho **Prepare each mixture in a labeled test tube and put the tubes in a beaker of boiling water for 5 minutes. Note color change and time of reaction. Discard contents into the designated waste container. C4 Questionss t 1. What is the visible observation for a positive Tollen's test? a positive Benedict's test? 2. Write the chemical equation for the positive reaction, showing the structures of the reactants and products.
Show transcribed image text Nelly StrackeLv2
29 Jul 2019