Chemical Chemical water water testing testing

Chemical hardness testing of Chemical hardness testing of drinking waterdrinking water

OurOur water has a hardness of 28dH which water has a hardness of 28dH which means that the water is hardmeans that the water is hard

Testing pHTesting pH

Our drinking water has a pH of 7, which Our drinking water has a pH of 7, which means that it is neutralmeans that it is neutral

Evidence for water pHEvidence for water pH

The solution is green which The solution is green which shows that the shows that the wwater is a neutral with a ater is a neutral with a pHpH of of 77

Nitrite NONitrite NO22

Even after 3 minutes we didn’t notice any Even after 3 minutes we didn’t notice any changes of colour,so there is no trace of changes of colour,so there is no trace of nitrite in our waternitrite in our water

Proving ammonia NHProving ammonia NH44

After 15 minutes of reaction we didn’t see After 15 minutes of reaction we didn’t see any changes of colourany changes of colour

After the addition of 15 more drops of After the addition of 15 more drops of reagent, reagent, we noticed a change in colour so we noticed a change in colour so there is ammonia in our school water there is ammonia in our school water but but according to the according to the rules it is the rules it is the allowed allowed amount of NH4 = 0.05 mgamount of NH4 = 0.05 mg

Proving nitrate NOProving nitrate NO33

When the reaction finished,we didn’t see When the reaction finished,we didn’t see any changes,so there is no nitrate in the any changes,so there is no nitrate in the waterwater

Proving phosphate POProving phosphate PO44

After we put the After we put the rereagents in the water, weagents in the water, we were observing were observing the reaction andthe reaction and we didn’t notice any changes in colour we didn’t notice any changes in colour , , so we concludeso we concludedd that there are no phosphates in that there are no phosphates in our our water water

Conclusion Conclusion In conclusion our statistics show next:In conclusion our statistics show next: Our water is hard(according to Our water is hard(according to

testing/28dHtesting/28dH pH is 7(neutral)pH is 7(neutral) There is no nitrite NOThere is no nitrite NO22

There is only a small amount of ammonia There is only a small amount of ammonia NH4(0.05 mg)NH4(0.05 mg)

There is no nitrate(NO3) or There is no nitrate(NO3) or phosphate(PO4) in the waterphosphate(PO4) in the water

Water is good for drinkingWater is good for drinking