of chemica which the rules are provided! thank you inadvanced

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of chemica which the rules are provided! thank you inadvanced

Of Chemica Which The Rules Are Provided Thank You Inadvanced 1 (44.92 KiB) Viewed 45 times

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Pre-lab preparation In your lab notebook, prepare the following (see lab notebook guide for details): 1. Write all procedures required for this experiment. Prepare it so that it can be used as a sole source of your experimental procedures. 2. Write detailed, hand-written reaction mechanism of methyl orange synthesis starting from sulfanilic acid, sodium salt and nitrosonium ion. You must include arrows, electron flow and lone pairs. 3. Create table of chemicals that include physicochemical data for all chemicals used (see Chapter 6). 4. Provide theoretical yield calculations. 5. Explain in writing why does the dimethylaniline couple with the diazonium salt at the para position of the ring? Support your answer with written resonance forms. In the laboratory The essential reactants for methyl orange synthesis are provided in Table 1. Table 1. Compound Sulfanilic acid Sodium nitrite Na CO, HCI (12M) Dimethylaniline Acetic acid NaOH (IM) MW 173.19 68.99 105.98 36.46 121.18 60.05 40 Reactants used amount used (calculate) (calculate) 5 mL (calculate vol.) (calculate vol.) (calculate vol.) 3 ml mmol 1 117 1 3 m.p. (C) d (g/mL) 1.18 0.956 1.049 Experimental procedure: diazotization of sulfanilic acid In the first step you must dissolve sulfanilic acid. To do that you have to turn it into salt form by reaction with a base. Weight out 173 mg (0.001 mole) of sulfanilic acid and transfer it into Erlenmeyer flask equipped with a spin vane. Next add 5ml. of sodium carbonate and stir it

▾ - ummary information about experiment to be performed Balanced chemical equations and reaction mechanisms, if applicable (correctly balanced reaction equation, correct reaction mechanism. This will be necessary to correctly calculate reaction yield. The reaction mechanism(s) must include curved arrow notation to account for electron flow, lone pairs of electrons, charges and correct molecular/ion structures. Solvents should not be included in the reaction equation, mechanism or any calculations. Calculated amount of needed chemicals (conversion from moles used to amount used) Handwritten table of chemicals that include physicochemical data for all chemicals used. Calculation of theoretical reaction yield (detailed and correct calculation of the number of moles of the reactants). All calculations, units and unit conversions must be clearly shown to gain full credit. Experimental procedures A table of the reactants, solvents, drying agents and products in the experiment must be included and each of these must be listed in its own row. There are 10 column headings: IUPAC name OR common name, structure, CAS number (Chemical Abstract Service number) molecular mass, melting point (if applicable), boiling point (if applicable), solubility (in water, if applicable), density, amounts to be used in the experiment, and the role. All chemicals used in the experiment must be listed and include correct units, spelling, amounts and roles (reagent/solvent/drying agent/product). IUPAC or common name An example of the format for a table of chemicals is shown below: Structure CAS # Molecular Melting Boiling Solubility Density point (in water) (units) (units) mass (units) point (units) 38 Amounts to be used (units) Role of the reagent