Learning Objectives
- Low pH means acidic.
- 7 is neutral.
- High pH means basic.
ChemistryMiddle / High School10 min
pH Scale
Use a pH meter and dilution to see how solutions move toward neutral.
pH meter
pH 3.0
0Acid7Base14
Live Values
pH
3.0
Type
Acidic
Dilution
0%
Result
Vinegar
pH vs dilution
Formula
pH moves toward 7 with dilution
Low pH is acidic, 7 is neutral, and high pH is basic.
Try this
Dilute a solution until the pH is close to 5.0.
The solution is still too acidic. Add more water.
Understanding the pH scale
What happened?
When water is added, pH gradually moves toward 7.
Why?
Dilution reduces the concentration of ions responsible for acidity or basicity.
Safety note
Educational simulation only. Do not mix real chemicals without teacher supervision.