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Old 04-22-2006   #1 (permalink)
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Neutralizing pH

I was wondering if anyone knew if there was a chemical that could neutralize pH. I can't test the pH before changing it so it needs to be able to raise OR lower pH.

Thanks,
sciguy
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Old 04-22-2006   #2 (permalink)
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Re: Neutralizing pH

What are you trying to neutralize the pH of? If the original pH is higher than 7, than use an acid, and if its lower, use a base. Bases neutralize acids and vice-versa.
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Old 04-22-2006   #3 (permalink)
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Post Vinegar, baking soda, and wood.

Quote:
Originally Posted by sciguy1216
I was wondering if anyone knew if there was a chemical that could neutralize pH. I can't test the pH before changing it so it needs to be able to raise OR lower pH.
Vinegar (containing C4H4O2, solution PH typically 2 - 3) and baking soda (NaHCO3, PH typically 8.1 – 8.6) are traditional, readily available, and cheap.

It’s often handy to increase PH (decrease acidity) with “buffering” agents, such as solid wood or charcoal washed in the solution. This can limit acidity (low PH) without producing excessive alkalinity (high PH), and doesn’t require PH to be measured first.


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Last edited by CraigD; 04-22-2006 at 04:54 PM.
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Old 04-22-2006   #4 (permalink)
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Re: Neutralizing pH

The problem is that I can't test the pH before I neutralize it. I don't know weather it is acidic or basic. I also don't know what I am going to be neutralizing all I know is that it is water with either an acid or a base added to it.
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Old 04-22-2006   #5 (permalink)
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Re: Neutralizing pH

use a buffer - buffers contain both acid and base and can maintain a pH at a neutral (or near neutral) level

The blood in our body contains such chemicals


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Old 04-23-2006   #6 (permalink)
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Re: Neutralizing pH

I tried both wood and charcoal with no effect. Know of any other buffers?
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Old 04-23-2006   #7 (permalink)
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Re: Neutralizing pH

Quote:
Originally Posted by sciguy1216
I tried both wood and charcoal with no effect. Know of any other buffers?
Here is a list of common buffers

http://www.science.smith.edu/departm...n_Buffers.html


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Old 04-24-2006   #8 (permalink)
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Question Re: Vinegar, baking soda, and wood.

Quote:
Originally Posted by CraigD
It’s often handy to increase PH (decrease acidity) with “buffering” agents, such as solid wood or charcoal washed in the solution. This can limit acidity (low PH) without producing excessive alkalinity (high PH), and doesn’t require PH to be measured first.
Does this apply to soil?
See thread on Terra preta soils.
Michael
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Old 04-24-2006   #9 (permalink)
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Re: Vinegar, baking soda, and wood.

Well I guess so. I know in the East Coast (Canada) they have highly acidic soil.
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Old 04-26-2006   #10 (permalink)
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Re: Vinegar, baking soda, and wood.

Craig Just re-posted your comment on charchol to the Terra preta thread (my hobbyhourse)
hope that is OK
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