Chemistry · Water Treatment
After the chlorination process, what is the recommended minimum concentration of free residual chlorine that should remain in drinking water to ensure safety?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12.0 mg/L
- 21.0 mg/L
- 30.5 mg/L✓
- 40.25 mg/L
Correct answer
0.5 mg/L
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