Question

answer all questions. use complete sentences
true/false questions

1. think carefully about the following statements. are they true or false? circle your answer and provide an explanation to get credit.

a. in filtration, the filtrate is always a pure liquid. explain:
b. drinking water can only be obtained from seawater by distillation. explain:
c. the fractional distillation of miscible liquids is only possible if the liquids have different boiling points. explain:
d. paper chromatography is a physical method for separating mixtures. explain:
e. mixtures have fixed melting and boiling points. explain:

1. name the techniques which are suitable for separating the following mixture and provide an explanation:

situation separation technique explanation
a. to obtain drinking water from muddy water
b. to separate petrol from crude oil
c. to remove leaves from a swimming pool
d. to obtain pure sugar from a solution
e. to determine whether the colouring in a fruit juice is a single substance or a mixture of coloured substance

1. you are asked to separate sand and sodium chloride. name the methods needed to carry out the procedure. explain how you would carry out the procedure to obtain pure sand and chloride back.
2. the following diagram shows a set - up of simple distillation. thermometer seawater substance p heat distillate

Explanation:

1.

a.

Filtrate can be a solution with dissolved substances, not always pure. For example, filtering salt - water gives a salt - water filtrate.

Reverse - osmosis is also a common method to get drinking water from seawater, not just distillation.

Fractional distillation of miscible liquids relies on differences in boiling points to separate them.

Answer:

False

b.