Using Resources RQP- analysis and purification of water samples from different sources, including pH, dissolved solids and distillation

Question 1

Method - Part 1 (Analysing water samples)

step 1

Answer 1

For each sample of water you are given, test the pH using either a
pH meter
or
universal indicator
and an appropriate colour chart. Record your observations carefully.

Question 2

Method - Part 1 (Analysing water samples)

step 2

Answer 2

For each sample of water, pour 50 cm3 into a clean pre-weighed
evaporating basin
. Heat gently over a Bunsen burner, tripod and gauze until no liquid remains. Allow to cool, then weigh the evaporating basin again and calculate the mass of solid that remains in the evaporating basin.

Question 3

Method - Part 1 (Analysing water samples)

step 3

Answer 3

compile/ analyse results

Question 4

Method - Part 2 (Distillation)

apparatus

Answer 4

• round flask (with stout on side of neck) with sea water in and boiling stones for smooth boiling underneath?
• water vapour rising up from this
• thermometer in the top of the flask
• stout on side of neck connected to a condenser (tube with box around middle)
• little lines on top left and bottom right of condenser (water out and cold water in)
• condenser end above pure water (distillate) in a flask

Question 5

Method - Part 2 (Distillation)

step 1

Answer 5

Heat your sea water solution until it boils gently.

Question 6

Method - Part 2 (Distillation)

step 2

Answer 6

After a period of time you should see distilled water being produced.

Question 7

Method - Part 2 (Distillation)

step 3

Answer 7

compile and analise results