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Combustion meaning and properties
group of atom or atom in a molecule which exhibit characteristics
Melting point
-Make sure that your sample is solid and dry by leaving them in a desiccator or an oven at 500c overnight. Sprinkle a thin layer of dry crude aspirin and the recrystallised aspirin on the ‘melting point determining block’ in two different areas. Heat the block slowly to increase the temperature and note the temperature range over which each substance melts.
Q/ Record the melting point ranges of the pure and impure samples and include a description of the melting process in each case. Research the theoretical melting point of aspirin and the salicylic acid and record. Account for any difference between the melting points of crude and recrystallised samples of aspirin
Boiling point of the homologous series of alkane decreases as carbon number
Explain why 2,2-dimethyl-3-butanol is unsatisfactory, and give a correct name, draw the structure
Extra Credit (5 pts) Reaction in refluxing acetone of the nucleophile potassium phenoxide (Pho-K', drawn below) with the (S) enantiomer of the starting X-substituted epoxides below gives different enantiomeric epoxide products as a function of the leaving group X. Note also that compound 2 also reacts about 4x as fast as 1, suggesting that at least in acetone, the CH SO, Ion is a better leaving group than the CF ion. Consistent with this idea, CH SO OH is a stronger acid than HCl in organic solvents like acetone (but not in water). Write careful mechanisms to explain the differing stereochemical results
12.1 grams of a poweder mixture of zinc and iton are introduced to a solition of hydrochloric acid in excess. Assuming the value of hydrogen obtained equals to 4.8 litters measured contions where molar voulume equals to 24 litter/mol calculate the weight of each metal in the mixture
12.1 grams of a poweder mixture of zinc and iton are introduced to a solition of hydrochloric acid in excess. Assuming the value of hydrogen obtained equals to 4.8litters measured contions where molar voulume equals to 24 litter/mol calculate tge weight of each metal in the mixture
A group of alkane in which each members of the group different from the next by -CH2 group is called ____.
What conclusions can you draw about the nature of the four samples tested for purity? Explain your answers.
