Chemistry Themodynamics Essay

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Carboxylic acids, their derivatives and Amines Experiment 1 5 cm3 of dilute ethanoic acid with : | Turned: | A few drops of U.I solution | Pinky red | Strip of magnesium | Effervescence | ½ spatula of sodium hydrogen carbonate | effervescence | ¼ spatula of Copper (2) oxide | Turns brown/black then goes deep blue | 3cm3 of ethanol + Conc H2SO4 + sodium carbonate solution | Smelt like modelling glue | Equations: 1. A) CH3COOH -> CH3COO- + H+ B) 2CH3COOH + Mg ---> (CH3COO)2 Mg + H2 C) CH3COOH +NaHCO3--->NaCH3COO + CO2 +H2O D) 2CH3COOH + CuO ---> (CH3COO) 2Cu + H2O E) Method 1. Set up a testube rack, with 5 test tubes. 2. Within each testube add 5cm3 of ethanoic acid 3. Add a few drops of U.I solution to the first test tube and record observations 4. Add a strip of magnesium to the 2nd test tube and record observations 5. Add half a spatula of sodium hydrogen carbonate to the 3rd test tube and record observations 6. Add a quarter spatula of copper (II) oxide and warm the solution gently to the 4th test tube and record observations. 7. To the 5th test tube, add 3cm3 of ethanol a couple of drops of conc, sulphuric acid and warm gently. Pour the resulting mixture into 30cm3 of sodium carbonate solution to remove excess acid and smell and record observations. Experiment 2 Time | Observations | 5 minutes | Bubbled like sugar | Once salt water was added | Turned soapy white and thick | Equation: METHOD 1) Put 2 cm3 of castor oil into a 250 cm3 beaker and add 10 cm3 of sodium hydroxide from a measuring cylinder. (Take care when measuring this out and adding it to the beaker to avoid any drips and spills.) 2) Heat the mixture gently over a tripod and gauze, STIRRING CONSTANTLY with a glass rod (otherwise the mixture erupts). Allow to simmer (boil gently) for 5 minutes. Steady the beaker using

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