Required Practicle: Purifying water.

Question 1

What is the first step we do?

Answer 1

= check the ph of the water- pure water has PH7
= Use a universal indicator paper and drop water onto it
= ph7= green
= not 7 means it is not pure
= if it is 7 it stil may have dissolved molecules

Question 2

How do we test for solids?

Answer 2

= use balance to weigh a empty evaporating basin
= fill basin with water sample, place on tripod and gauze
= gently heat water until evporated
= allow basin to cool and weigh again
= mass would increase if there were dissolved solids
= if it did not increase could be pure

Question 3

How do we purify water using distillation?

Answer 3

= conical flask on tripod + gauze
= delivery tube into a test tube
= test tube is in a beaker filled with ice + water
= heat the water and boil gently and evaporate
= water vapour condenses back into water
= distilled water