Calculating Ammonia/Water Ratio for pH Adjustment

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SUMMARY

The discussion focuses on calculating the amount of ammonia (NH3) needed to adjust the pH of 100,000 liters of stormwater from a baseline of 8 to a target of 9 or greater. The ammonia is at a concentration of 25% and has a pH greater than 13. Participants emphasize the importance of understanding the initial water chemistry, including potential buffering agents that maintain the pH at 8. The inquiry highlights the need for precise calculations based on the water's existing conditions.

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  • Understanding of pH scale and its implications in water chemistry
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  • Basic principles of buffering in aqueous solutions
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FC Copenbadly
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Hello!

If I have 100,000 litres of water at a pH of 8. How much NH3 at a concentration of 25%, pH >13 would I require to bring total pH to 9 or greater. An approximate figure would suffice if anyone can help.

Thanks in advance.
 
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We need to know what is in the water and its concentration that is keeping the pH at 8. Is it buffered at pH 8, for example?
 
Hi,

Thanks for the reply.

It's just a reservoir of storm water. The pH before hand might have been 7 or 7.5, I'm just wondering how much ammonia it would take to raise the pH of 100,000 litres by 1. Either from 7 - 8 or 7.5 - 8.5 Hopefully this is enough information but if you require more I'll do my best and thanks again.
 

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