Organic Matter and pH
To measure pH we had to put in the water test strips, depending on the colour takes a different value.
To measure the organic matter, we had to be measured in river water (10 ml) add 2 drops of the solution of potassium permanganate and 5 drops of sulfuric acid.
• 2 test tubes
• 2 plugs
To determine the pH put in the river´s water the test trips, and depending of the color, it takes different value
The water sample changed the colour in less than 3 minutes; so the value is about 3.
The values of pH of the Guadalquivir river water is between 7 and 8.
We could check that there was organic matter throughout the course of the river Guadalquivir, because the water sample changed color very quickly.
We could check that the pH of Guadalquivir river is neutral.
Thus river water is habitable for most fish and plants who can live normally.