projeto comenius " life-giving water" this project has been funded with support from the...
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Escola Secundária de Almeida Garrett Comenius " Life-Giving Water" Water Analysis Water SamplepH Douro river7,01 Tap water8,26 Rain water7,54 Tap water pH values should be 6,0TRANSCRIPT
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Projeto Comenius " Life-Giving Water"
This project has been funded with support from the European Commission.This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.
![Page 2: Projeto Comenius " Life-Giving Water" This project has been funded with support from the European Commission. This publication [communication] reflects](https://reader036.vdocuments.site/reader036/viewer/2022062317/5a4d1b647f8b9ab0599af626/html5/thumbnails/2.jpg)
Escola Secundária de Almeida Garrett
Comenius " Life-Giving Water"
Water Analysis
Materials:
Procedure of the experiment
• 3 beakers with different types of water: river water, tap water and rain water:
• 6 graduate recipient;
• pH meter
• dropper
• Measurement of pH• Hardness
![Page 3: Projeto Comenius " Life-Giving Water" This project has been funded with support from the European Commission. This publication [communication] reflects](https://reader036.vdocuments.site/reader036/viewer/2022062317/5a4d1b647f8b9ab0599af626/html5/thumbnails/3.jpg)
Escola Secundária de Almeida Garrett
Comenius " Life-Giving Water"
Water Analysis
Measurement of pH
Water Sample pHDouro river 7,01
Tap water 8,26
Rain water 7,54
Tap water pH values should be 6,0<pH<9,5
![Page 4: Projeto Comenius " Life-Giving Water" This project has been funded with support from the European Commission. This publication [communication] reflects](https://reader036.vdocuments.site/reader036/viewer/2022062317/5a4d1b647f8b9ab0599af626/html5/thumbnails/4.jpg)
Escola Secundária de Almeida Garrett
Comenius " Life-Giving Water"
Water Analysis
HardnessHard waters are generally considered
to be those waters that require
considerable amounts of soap to
produce a foam
The soap-consuming capacity is most important because of economic
aspects and because of the difficulty encountered in obtaining
suitable conditions for optimum cleansing.
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Escola Secundária de Almeida Garrett
Comenius " Life-Giving Water"
Water Analysis
Hardness
Water Sample NumberDouro river 1
Tap water 2
Rain water 3
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Escola Secundária de Almeida Garrett
Comenius " Life-Giving Water"
Water Analysis
The hardness of waters varies considerably from place to place
Hard waters
Average hardness
Soft waters