The process of esterification requires very precise and pedantic measurements, what this requires is the minimal deficiencies in your result, just taking the lowest value of the three results would not be recommended, I doubt that any chemistry teacher would have said something like that. If you have three results you would nomally average them but not always. When you end up with two similar results and one result far off, you only average the two close ones. Some teachers ask you to not include the result of your first titration so only average the second and third. NEVER just take the lowest number!
Second part of your answer is quite self-explanatory if you are a girl with lots of interest in cosmetics and nurition. (just joking...)(It wasn't meant to be funny).
Esters are widely used as fragrances in the cosmetics industry and as flavouring agents in the food industry. The natural flavours of foods are usually a complex mixture of several esters. However, chemists can identify the main esters in these natural flavours and manufacture them in the laboratory. The natural perfumes produced by many flowers are also esters. Again chemists can manufacture these esters in the laboratory to mimic these natural odours.
Ethyl acetate (ethanoate) is widely used as a solvent in industry. It is also
the common solvent in nail polish remover. It is manufactured on a large
scale from acetic acid and ethanol, using in principle the same process as is used in the laboratory. High molecular weight (i.e. non-volatile) esters such as dialkyl phthalates are used as plasticisers in some plastics such asPVC: they make the materials soft and pliable.
The flavourings in your lollies are from:
Orange flavour: Octyl ethanoate
Raspberry flavour: butyl ethanoate
Grape flavour: ethyl methanoate
Hey hope this help you ...
