Think about how acids and bases would affect the water quality in the two lakes. Which set of pH data would you expect to see based on your observations? Lake A: pH = 4. 5; Lake B: pH = 7. 5 Lake A: pH = 8. 3; Lake B: pH = 3. 7 Lake A: pH = 6. 6; Lake B: pH = 6. 8 Lake A: pH = 10. 2; Lake B: pH = 1. 7.