Phosphoric acid

[barney]

Hello,

I have done a search for this topic and only the few items on it are accessible, there are four pages of results and some of the comments are stuff which I am interested in at the moment but there are no headings to access the post, what is the point of this please?

I would like to calculate how mush Phosphoric Acid is needed to reduce the PH of water by one point. The acid I have bought is food grade at 85% strength. I would rather calculate it than go by trial and error if possible.

Any other relevant informations of this product would be appreciated.

[barney]

any takers?

Whats going on here? Six months ago before the CBA split there would have been tons of useful experience and advice posted,

[GrowlingDogBeer]

I'm not sure what you mean by your post about the search not working. If there are specific things missing then examples would be helful so they could be investigated. If some things appear missing it may be due to people leaving the forum and removing all there posts.

I just did a search for Phosphoric Acid and got 12 pages of results, all with headings so you could get to them.

I'm not quite sure what connection there is between whats going on at the CBA and the advice you recive on here.

Maybe it is just that nobody who knows the answer to your question has been along yet. Water treatment is a complex area that only a few people seem to really understand well enough to give advice on, and I'm not one of them.

[barney]

Thanks Steve

Just done the search again and turned up 58 results over 4 pages, only the first six item are accessible with a heading and three are from this thread.

I have tried the search with capital letters and without, no difference.

I must be being a little impatient due to frustration.

[GrowlingDogBeer]

I've just re researched and I get 12 pages, I have found what you mean about no headings though.

This thread for example

The first post has a heading, but the rest of the posts don't so come up in a search with no heading. You can still get to them from the search, if you look over to the right where the details of the poster are, there is a heading called Topic, and next to that is the name of the thread. If you click on that then it takes you to the correct thread.

viewtopic.php?f=9&t=11493&hilit=phosphoric+acid

[Aleman]

I would like to calculate how mush Phosphoric Acid is needed to reduce the PH of water by one point. The acid I have bought is food grade at 85% strength. I would rather calculate it than go by trial and error if possible

Why?

The pH of water is irrelevant in brewing.

How much acid you use will depend on the water you start with. Distilled water will need a lot less than hard water from Reading for example. Generally the calculations that we do around these things assume that you start with either distilled water or a known concentration of a salt (say Monosodium phosphate in the case of producing a phosphate buffer at a known pH)

Generally if I am trying to produce acidified water for say iodophor production then I tend to set a litre of tap water on the stir plate, plunk in the pH meter and add my designated acid until I get the pH I desire.

[barney]

Steve that has sorted out the heading problem. Thank you!

Aleman,

I am looking at making a SNPA clone and I have read that ALL their water is treated with Phosphoric acid to bring the PH down to 5.5, so I want to do the same. I have very soft water with an alkalinity of about 15 mg/l (Salifert figure)

I have started reading up on the subject and of course a little knowledge is a dangerous thing. I have it my head that I would like to bring the mash PH down to the correct level and then adjust the salt profile in the boiler, where the effects will stick rather than get reacted away in the mash(?)

IT would also be interesting to understand what's going on with the reactions between the chlorides and sulphites etc in my base water before I put that into the calculator as my base and adjust the chloride/sulphate balance to where I want it in the boiler.

I have other uses in my head like washing yeast with the correct Ph level solution etc.

[sladeywadey]

Hello,

I have done a search for this topic and only the few items on it are accessible, there are four pages of results and some of the comments are stuff which I am interested in at the moment but there are no headings to access the post, what is the point of this please?

I would like to calculate how mush Phosphoric Acid is needed to reduce the PH of water by one point. The acid I have bought is food grade at 85% strength. I would rather calculate it than go by trial and error if possible.

Any other relevant informations of this product would be appreciated.

The bru'n water calculator at the site below will help you calculate what you require but you must know your water composition prior to this.

http://sites.google.com/site/brunwater/

[Eric]

I am looking at making a SNPA clone and I have read that ALL their water is treated with Phosphoric acid to bring the PH down to 5.5, so I want to do the same. I have very soft water with an alkalinity of about 15 mg/l (Salifert figure)

Is it not possible that with such low alkalinity, your mash pH might be naturally 5.5 or less?