» The "Big Splash", a global school experiment on water quality launched on World Water Day
04.04.2011 -

The "Big Splash", a global school experiment on water quality launched on World Water Day

© UNESCO/R. Sigamoney

On the occasion of UN World Water Day, 22 March 2011, UNESCO and IUPAC launched the International Year of Chemistry (IYC) Global Experiment (the “Big Splash”).

For the event, 1,000 students aged 15 to 18 tested water quality in the Cape region of South Africa from 22 to 25 March, measuring salinity and acidity, and learning how it is filtered and distilled. This event was organized in collaboration with the City of Cape Town Municipality.

The IYC Global Chemistry Experiment (entitled “Water: A Chemical Solution”) consists of four component activities: pH measurement, salinity measurement, filtration/disinfection, and desalination.  Each can be carried out by children of all ages in schools around the world and no special equipment is needed (all experiments can be done with laboratory equipment at schools).  The activities are adaptable to the skills and interests of students of various ages and use equipment that is widely available.

The theme for UN World Water Day 2011 was “Water for Cities: Responding to the Urban Challenge”; the event also coincided with the South African National Water Week and thus the learners were exposed to different activities which emphasized the importance of water in their city, Cape Town. Pupils from different schools in Cape Town (areas such as Langa, Khayelitsha, Hout Bay, etc) were firstly exposed to the difficulties of obtaining water from a standpipe in Khayelitsha (an informal settlement). This activity taught the learners the hardships faced daily by people in informal settlements as well as how they cope. They were then transported to Ratanga Junction where they watched a delightful play performed by Jungle Theatre which taught them the importance of conserving and preserving their local water supplies.  

Thereafter the learners eagerly completed two of the four experiments for the IYC Big Splash with the expert supervision of Erica Steenberg from RADMASTE Centre, University of Witswatersrand, and 3 volunteers. The participating pupils enthusiastically found the pH of a sample of water from Intaka Island (a wetland in Cape Town) and thereafter filtered and purified the water. This was the first chemistry experiment that most of the pupils had ever carried out and  their excitement at completing the exercise and obtaining the results was delightful to witness. Their total engagement  in the experiment was evident in the many questions that they asked.

The Department of Science and Technology in South Africa generously donated IYC Global Experiment kits to the schools that attended the Big Splash as the schools lacked the equipment to conduct the Experiment. In a brief opening ceremony on 22 March 2011, presided over by UNESCO, the Deputy Minister of Science and Technology, Mr. Derek Hanekom, presented the schools with their kits for the IYC Global Experiment. Sasol also sponsored the event and provided the learners with caps which were elatedly accepted.   

After its launch in South Africa, the global experiment will be available to interested schools all over the world. It aims to raise the awareness of primary and secondary school students of the importance of water as a vital resource. Students will be able to register the results of their tests in an interactive on-line map.

The International Year of Chemistry activities are also supported by global partners Dow and the European Petrochemical Association (EPCA) and global sponsors BASF, L’OREAL Foundation-UNESCO For Women in Science, CEFIC, SOLVAY and EVONIK Industries.

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