Monday, August 23, 2010

Workbook- Chapter 6 Worksheet

3 Thoughts:
1) I have learnt that ethanol is a solvent which is a type of alcohol. When ethanol is mixed with another substance like iodine, they will form to become a mixture.
2) When using the fractional distillation method, the substance with the lowest boiling point will be found at the top most fraction as when the mixture is heated, it is the first to be evaporated and the hot water vapour will then rise in the fractionating column and condense into liquid. The boiling point of the substances that go down the column will be higher and heavier in weight.
3) I have also learnt that filter, filtrate and filtration are all different. Filter(also known as filter paper)- An apparatus used to separate insoluble substances from a mixture. Filtrate- The substances(liquid) found in the beaker (when using the filtration method) is called filtrate while the substances found on the filter paper are called residue. Filtration- The process/method to separate mixtures.

2 Questions:
1) What is the difference between filter paper and filtrate paper?
2) How long will the mixture, crude oil, be separated using the fractional distillation method?

1 Useful application:
1) Since we know that ethanol is a type of alcohol, we are able to purchase this type of alcohol by saying the correct name(ethanol) in the shop. We are also able to explain the differences between filter, filtrate and filtration to our friends who do not understand them.

1 comment:

  1. Rose - We do not use the term filtrate paper. Instead, filter paper is the correct term used to describe the paper outlining the filter funnel during filtration.

    Regarding your next question, it is indeed an interesting one. Well, not much information is available on the time taken for the fractional distillation to complete. Well, I think the time taken for the separation is much dependent on the mass of the mixture and maybe the column height...If you do find any other relevant information, pls share with me.

    Mdm Riza

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