Answer:
The substance with the maximum pH, meaning it is the most basic, is:
3) sea water
Here's a breakdown of the pH values of each option:
Lemon: Around 2.2 - 2.5 (strongly acidic)
Rain water: Around 5.0 - 5.6 (slightly acidic to neutral)
Sea water: Around 8.0 - 8.2 (slightly basic)
Apple: Around 3.0 - 3.5 (acidic)
Therefore, sea water has the highest pH value among the choices, making it the most basic.
Here are some additional facts:
The pH scale ranges from 0 to 14, with 7 being neutral. Values below 7 are acidic, and values above 7 are basic.
The acidity or basicity of a substance is determined by the concentration of hydrogen ions (H+) in its solution.
Seawater is slightly basic due to the presence of dissolved carbonates and bicarbonates, which act as buffers and prevent large fluctuations in pH.
