An unhandled error has occurred.
Reload
X
UIZFORGE
Exams
Pricing
Career Paths
Resources
EN
Login
Sign Up
1
/ 5
Advanced
An indoor pool has pH 7.3, free chlorine 2.0 ppm, combined chlorine 0.2 ppm, and persistent eye complaints only during a crowded class. The instructor uses waterproof lotion demonstrations before entering. What prevention target is most plausible?
Lower pH to 6.8 before the class.
Stop measuring combined chlorine because it is low.
Replace the heater because eye irritation is never chemical.
Control introduced contaminants through showering and product-use rules while monitoring class-period chemistry.
AI Tutor
Stuck? Get a hint
