Hi, I am Ellie and I am doing water pH level experiment so I thought it would be nice if I shared the result.
What is pH?
For those of you who doesn’t know about pH level, pH level measures the acid level of the water.
Research Question
Will the pH level change depending on the type of the water and/or water condition?
Why I do this experiment?
I have pet fishes at home and they need pH level of 8 or more. If it’s not above 8, they might die. Some of my fish died and I was afraid it was because the pH level was too low. So I measured the pH level of the water in the fish tank. It was 8 and it was good. Also, the testing material changed the water color to green, and I thought it is very cool so I left it there for few days. After few days, the color changed to orange which represent pH level of 5, very acid. I wondered why it changed and I thought I can do some experiment.
Why this experiment is important?
This experiment will help me in my daily life because I am planning to buy some more fishes and some of the fishes might need lower pH level or higher pH level. I would know how to adjust the pH level by doing this experiment so I would be able to buy some more pet fishes when I moved to the new house.
Variables
Independent variable
Type of water, and/or water condition
Dependent variable
pH level of water
Controlled variables
The amount of water — 70 ml
The amount of chemical that measures pH level — 10 drops
The place where I leave the bottles — my living room
The amount of air that water gets — none at all for with lid bottles, 24 h/d for without lid bottles
Material
6 bottoles
140 ml of tap water
140 ml of water from the fish tank
140 ml of water that was left outside of the house.
60 drops of chemical that measures pH level
Procedure
- Measure 70 ml of water and put it in one of the bottles, do the same for all of the remaining bottles
★Type of the water must be correct, there must be 2 bottles of tap water, 2 bottles of water from the fish tank, 2 bottles from the water that was left outside of the house
2. Put 10 drops of chemical into each bottles
3. Close the lid ad shake the bottle until the water color changes. Do the same thing for all of the remaining bottles.
4. Record the pH level of each of the bottles
5. Open the lid for one of the bottles of each type of water
6. Record the pH level of each bottles every day and observe for any unusual change
pH level record chart
If you want to observe for more than 4 days, you can extend the chart. I didn’t have enough space for more than 4 days so I am making another chart from day 5 to day 9, day 10 to day 14.
I am going to write rest of the report as another blog a few days later. See you in the other blog!
