Phosphoric Acid preporation ƒ ƒ

[BomeX]

To my suprize TFSE did not show any info on creating this
usefull acid and google was not much help either. I found
something that said to use bone meal and sulfuric acid but
was not specific. Bone meal at garden stores contains 20%
phoshoric acid and cost around $6 for 20 lbs. All the
garden shops said to use this [0-57-0 bone meal] when I
asked for ph-down. Im sure bees would rather make their own
as opposed to online ordering. So hows it done?

It only takes 1 beer to get me drunk, Im not sure if its
the 11th or 12th one

[hest]

There is no Phosphoric Acid in bonemeel. But alot of other phosphorus salts. But it is otc can't remember where (some toilet cleaner I think) Why not just by it at your local plant center ? (as a Phosphor additive the weed guy's uss a shitload (and how much is a shitload ??) off the stuff.

[acid_egg]

I think ammonium phosphate is widely available as a fertilizer,so that reacted with sulphuric.Was it bone meal or bone ash,but I think the latter would be cleaner.
Strange recommendation for ph-down,try putting that shit in your hydrofarm!
Anyway phosphoric should be available at any good hydro store,just check it isn't mixed with nitric.Obviously you're shopping at less switched on    garden stores
Brain-Wax^® and Elbow-Grease^® the choice of all good Chemists everywhere!

[BomeX]

Anybody know of any otc names or brands for this shit? I
went to Franks Nersery,k-mart,wal-mart, and mijers garden
centers and did not find ph-down. The ingredients on bone
meal said contains 20% phosphoric acid among other
phosphorus.

It only takes 1 beer to get me drunk, Im not sure if its
the 11th or 12th one

[MescalToad]

Why would you want to make your own? Around swiMT's area, swiMT can obtain it as 'rust remover' from hardware stores quite cheaply.

[BomeX]

Ill shall check into it tomarrow

It only takes 1 beer to get me drunk, Im not sure if its
the 11th or 12th one

[VideoEditor]

Your not looking hard enough, or are you looking too hard? Maybee your head is like concrete, etched by the chemicals you've done. Think man, your like the Bear that left a  spot on my driveway. So put your leg down.
Real Men Don't Preview Their Edits

[Elementary]

The ingredients on bone meal said contains 20% phosphoric acid among other phosphorus.

NO ! there is no free phosphoric acid in that stuff, they are just quoting the possible phosphoric percentage in the phosphate salts.

Just do some searching on altavista etc for hydroponic suppliers and mail order a bottle of pH Down !

Making your own phosphoric acid from bone ash or triple phosphate can be a messy business and impurities are difficult to remove as phosphoric acid can not be distilled.

Comercial ortho-phosphoric acid is prepared by digesting bone-ash with diluted sulphuric acid, s.g. 1.5 (60% H₂SO₄), for several hours :
Ca₃(PO₄)₂ + 3H₂SO₄ = 3CaSO₄ + 2H₃PO₄
The calcium sulphate is filtered off and the phosphoric acid evapourated to s.g. 1.7 (85% H₃PO₄). The product is impure,and contains acid calcium phosphate CaH₄(PO₄)₂

Don't cry for me I'm the cleaner

[BomeX]

Ive looked at all the concrete cleaners/etchers its all
muriatic. That orange stuff that MT suggested contains to
much other shit, so online ordering it is.

It only takes 1 beer to get me drunk, Im not sure if its
the 11th or 12th one

[BomeX]

I have a 1/2 gallon of sulfuric to get rid of so SWIM will
try this. 2 questions, Did you mean evap off the sulfuric
instead of the phosphoric?  Bone meal can be burned to
create bone ash correct?

It only takes 1 beer to get me drunk, Im not sure if its
the 11th or 12th one

[Elementary]

Look at the formula !

You will not need to remove sulphuric acid if the correct amount is used.

Evaporation increases the concentration of the phosphoric acid once the calcium sulphate has been filtered.

Not sure about bone meal, I would stick to bone ash or a phosphate fertilizer.
Don't cry for me I'm the cleaner

[ogjimkenobi]

[lugh]

Start with Post 201934 (not existing) then use the fucking search engine