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Topic: Amount of NaHCO3 needed to maintain the pH at 7.5? (NH4CL slon)  (Read 2636 times)

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Offline pioneer

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Amount of NaHCO3 needed to maintain the pH at 7.5? (NH4CL slon)
« on: May 27, 2011, 11:31:28 PM »
Hi,

I have  a 120 L tank filled with NH4CL solution (Concentration is 76 mg NH4Cl/L).I need to maintain the pH at 7.5. How much NaHCO3 (sodium bicarbonate) should I add to get the desired pH (7.5)?
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Offline pioneer

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Re: Amount of NaHCO3 needed to maintain the pH at 7.5? (NH4CL slon)
« Reply #1 on: May 28, 2011, 05:41:27 AM »
Thank you for the reply.

I tried the (LogC vs. pH) diagram but I am not sure if this was the only method I can use, and if this is the only method I need to be sure.
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Offline Borek

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Re: Amount of NaHCO3 needed to maintain the pH at 7.5? (NH4CL slon)
« Reply #2 on: May 28, 2011, 07:47:56 AM »
If you have such plot, you can use it - but that's equivalent to stating "if you are given an answer, than you have an answer".

In general this is multicomponent acid/base equilibrium, not necessarily an easy one to solve.
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