Question

part b according to the chart, which substance has the lowest oh- concentration? a milk b pure water c battery acid d liquid drain cleaner

Explanation:

Step1: Recall the relationship between pH and OH⁻ concentration

The lower the pH, the higher the H⁺ concentration and the lower the OH⁻ concentration.

Step2: Identify the pH of each substance

Milk has a pH around 6.5 - 6.8, pure water has a pH of 7, battery - acid has a very low pH (around 0 - 1), and liquid drain cleaner has a high pH (around 14).

Step3: Determine the substance with the lowest OH⁻ concentration

Since battery - acid has the lowest pH among the given substances, it has the lowest OH⁻ concentration.

Answer:

C. Battery Acid