Final answer:
The hydrogen ion concentration of swimming pool water with a pH of 8 is 3. 1.0 x 10⁻₈ M, which indicates that the pool water is slightly basic.
Step-by-step explanation:
The student's question is about determining the hydrogen ion concentration of swimming pool water with a pH of 8. In chemistry, we use pH to describe the acidity or basicity of a solution. The pH scale is logarithmic, which means each whole pH value below 7 is ten times more acidic than the next higher value, and each whole pH value above 7 is ten times more basic.
Since the pH is the negative logarithm of the hydrogen ion concentration, a pH of 8 corresponds to a hydrogen ion concentration of 10-8 moles per liter (M). Therefore, the correct answer is 3. 1.0 x 10-8 M, which indicates that the solution is slightly basic.
When dealing with swimming pool chemistry, the ideal pH is usually around 7.2 to ensure the water is safe and comfortable for swimmers. Above this pH, the water becomes more basic, and below this value, it becomes more acidic.