All the components are packed in a plastic container (approximate dimensions: 170mm x 120mm x 65mm).
This container is also used for the solar still.
- 1x Petri dish with lid
- 2x 2 ml plastic syringe
- 5x propettes
- 1x comboplate
- 1x set microspatula forceps
- 1x plastic teaspoon
- 1x piece of cling wrap
- 2x elastic bands
- 1x microstand cross arm
- 2x large sample vials with lids (plastic)
- 1x small piece of prestik
- 2x pieces of paper towel
- 1x small piece of cotton wool
- 10x chlorine test strips (0 – 10 ppm) with colour chart
- 1x table salt (in Ziploc bag )
- 1x alum crystals (in Ziploc bag)
GLOBAL WATER EXPERIMENT ACTIVITIES THAT CAN BE DONE WITH THE KIT
(also using selected resources from the School Resource Kit)
Water Quality Activities:
1. pH of the Planet – Using coloured indicator solutions, learners are able to measure and compare the pH of different water samples. Average results per class or per sample can be submitted to the IYC Global Database.
2. Salty Waters – A saline solution (the “salty water” sample) is prepared and a known volume is placed in a Petri dish. The water is allowed to evaporate. The Petri dish is weighed before and after evaporation to find the mass of salt that was dissolved in the water. A natural water sample can also be used, such as sea water. Older learners can find the density and salinity of the sample. These results can be reported to the IYC Global Database.
Water Purification Activities:
3. Water Treatment – A dirty water sample is first aerated and then alum is added to coagulate solid matter (using large plastic vials). The water is filtered and the filtrate is treated with a hypochlorite solution to chlorinate it and kill any micro-organisms. This final chlorination step uses chlorine test strips to determine free available chlorine in the water. The minimum number of drops of hypochlorite that leads to 1 – 3 ppm chlorine after ten minutes is reported to the Global Database.
4. Solar Still -A coloured saline sample is placed in the lunch box of the kit in the sun. Evaporation of the water occurs. The clear, colourless condensate is collected in a Petri dish to show that desalination using a solar still is one method of purifying water. A Solar Still yield can be reported to the Global Database.