How much ammonia will be released from neutralizing 1ppm total chlorine?

[Miami Reef]

I filled a 5 gallon bucket with tap water.

Hach test kit: 0ppm free chlorine; 1ppm total chlorine

How much ammonia will become released from neutralizing the 1ppm chloramine with sodium thiosulfate?

@Randy Holmes-Farley

 

[MnFish1]

I filled a 5 gallon bucket with tap water.

Hach test kit: 0ppm free chlorine; 1ppm total chlorine

How much ammonia will become released from neutralizing the 1ppm chloramine with sodium thiosulfate?

@Randy Holmes-Farley

Your question is unclear - I know you asked Randy - but maybe you want to re-phrase. Why do you think that the 1 ppm chlorine represents 1 ppm chloramine? Here is a link that might help your question: https://www.koiphen.com/forums/show...ia-is-released-when-adding-sodium-thiosulfate

 

[Miami Reef]

Your question is unclear - I know you asked Randy - but maybe you want to re-phrase. Why do you think that the 1 ppm chlorine represents 1 ppm chloramine? Here is a link that might help your question: https://www.koiphen.com/forums/show...ia-is-released-when-adding-sodium-thiosulfate

Total chlorine - free chlorine = chloramine

 

[MnFish1]

Total chlorine - free chlorine = chloramine

Based on what? There can be many compounds binding with chlorine. Note - I'm not disagreeing with you. I'm just trying to tease out what your asking

 

[Miami Reef]

The total residual Chlorine is nothing more than the sum of the combined Chlorine(chloramines) and the free residual Chlorine.

https://www.digimed.ind.br/br/suporte/blog/chlorine-types

Chloramines are a type of combined chlorine that form in water and then off gas into the air above the water.

https://www.cdc.gov/healthy-swimming/toolkit/chloramines-and-pool-operation.html

The sum of combined chlorine and free chlorine is total chlorine (combined chlorine + free chlorine = total chlorine).

https://www.forbes.com/home-improvement/pool/free-chlorine-vs-total-chlorine/

 

[Randy Holmes-Farley Verified Community Expert]

The answer depends on the unit of measure used for the chloramine, but 1 ppm of actual chloramine will release 0.33 ppm of ammonia.

 

[Miami Reef]

The answer depends on the unit of measure used for the chloramine

Can you elaborate on this? I’m not sure I’m understanding that part.

 

[Malcontent]

The answer depends on the unit of measure used for the chloramine, but 1 ppm of actual chloramine will release 0.33 ppm of ammonia.

The Hach chlorine tests say "Cl2."

I'm skeptical when (other) people claim to detect >2 ppm ammonia in their tap water given that the regulatory limit for Cl2 is 4 mg/L and chloramine is made by dosing chlorine and ammonia in a ~4.5-5:1 ratio...

 

[Randy Holmes-Farley Verified Community Expert]

Can you elaborate on this? I’m not sure I’m understanding that part.

If a kit measures total chlorine or measures chloramine as chlorine (cl2), then 1 ppm real chloramine (NH2Cl) will read as about 1.4 ppm chlorine (cl2) because chloramine weighs less than cl2.

Its even more complicated than that because chloramine can also include other species such as NHCl2 and NCl3.