medium · Act science
A researcher measures the pH of a solution after adding increments of a base: Base Added (mL) | pH Level 0 | 3.0 5 | 3.5 10 | 4.2 15 | 6.8 Which of the following is true about the rate of pH change between 0 and 15 mL?
- The pH level will eventually stabilize at 7.0 regardless of how much base is added.
- The rate of change increases as more base is added, indicating a non-linear relationship.
- The pH level is directly proportional to the amount of base added to the solution.
- The pH level increases by a constant 1.27 units for every 5 mL of base added.
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