haleywisman880 haleywisman880
  • 07-08-2024
  • Chemistry
Answered

What is the combined available chlorine residual in a sample of treated water with a total chlorine residual of 5mg/L and a free chlorine residual of 2mg/L?
1. 7mg/L
2. 3mg/L
3. 2mg/L
4. 5mg/L



Answer :

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