Re: pH crashes maybe not

[Wright Huntley <jwwiii at pacbell_net>]

Scott Lewis wrote:

> Wright Huntley wrote:
> 
> 
>>Likewise, ammonia can kill at higher pH (more gets converted from
>>ammonium) and nitrite gets deadly at pH below about 6.5. It is the toxic
>>materials damaging the fish, and it just happens that pH correlates with
>>the chemical effects that render them lethal.
>>
> 
> Wright, could you point me to a reference that describes the increased toxicity of
> nitrites at low pH levels?


My recent move left all my reference books scattered or stored, so not 
really. Sorry Scotty.

You might start with Spotte, but I'm not too sure it is there.

I understand the equilibrium change in the ammonium/ammonia ratio as pH 
increases. If you find a good description of the nitrite chemistry, how 
about sharing it here, with us. I have never been sure why nitrite (NOT 
nitrate, BTW) is worse at lower pH. Nitrates appear to be harmless in 
concentrations below about 200-300 ppm, regardless of pH.

Wright

-- 
Wright Huntley -- 209 521-0557 -- 731 Loletta Ave, Modesto CA 95351

"All Congresses and Parliaments have a kindly feeling for idiots,
and a compassion for them, on account of personal experience and heredity."
                                 -- Mark Twain --

Now Justice Stevens and a majority of the Supreme Court join them!


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