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.
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Projeto Comenius " Life-Giving Water" This project has been funded with support from the European Commission. This publication [communication] reflects.
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 6,0
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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.
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
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
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.
Escola Secundária de Almeida Garrett
Comenius " Life-Giving Water"
Water Analysis
Hardness
Water Sample NumberDouro river 1
Tap water 2
Rain water 3
Escola Secundária de Almeida Garrett
Comenius " Life-Giving Water"
Water Analysis
The hardness of waters varies considerably from place to place