Ammonia

single said:
Where can i get ammonia crystals or powder at a decent price? Do farm suppliers sell it under a different name?

Is it this stuff? http://www.ebay.co.uk/itm/2-5-Kg-Sulphate-of-Ammonia-Fertilizer-/380247571821?pt=LH_DefaultDomain_3&hash=item5888857d6d (i'm making GRP cleaner)
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Ammonia is a gas. It is available in cylinders but it is very soluble in water and is available as a solution from hardware stores and DIY stores.. The highest concentration is 880, so called because it has a density of 0.880 g/cc.

Some care, goggles and gloves and good ventilation, is needed when handling 880 ammonia. Off hand I don't know the concentration of the solutions available over the counter. Solutions are fairly strongly alkaline.

Ammonium sulphate crystals are available from garden centres etc.

Ammonium carbonate is used as "smelling salts"
 
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VicS said:
Is there an explosion risk with ammonia?

If you use oxalic acid be aware of its toxicity
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Ammonium nitrate, the common fertiliser, will explode if mixed with an oil such as diesel. This mix is used in quarries as an explosive. Large stacks of pure AN will explode if heated. Large quantities need an explosives licence.
 
But nobody was talking about ammonium nitrate!

Bubble oxygen through 880 ammonia and allow to pass over a coil of heated Pt wire and it can explode....... but makes a safe and interesting demo of catalysis if air is used


There is also an interesting experiment involving ammonia and iodine
 
Unusual thread
Chap looking for constituent of explosives & being offered advice on further enhancements !!!

That should keep MI5 busy for a while
Look out for a new forumite joining with the name "Mr Smith"
Expect to get your phones tapped any day soon
 
Potatoes are what you need,

According to the Daily Mail this morning and this is the quote,

"The Science: When iron gets wet it oxidises, producing rust. But potatoes contain oxalic acid, which reacts with the iron in the rust to make a compound called ferric oxalate. This dissolves in water and can be wiped off. Declan says: ‘The aim here is turning the insoluble oxide in the rust into soluble salts which can be removed. The potato is good because the oxalate traps the iron ions as if in a cage and makes the structure more soluble so they can be washed away.’

The verdict: I used a potato to scrub an old iron bowl left in the garden over the winter. Amazingly, it worked. With a little rubbing, it turned the rust into a dirty sludge which could be wiped away. The potato was easy to grip and kept producing plenty of juice. I then did the other side of the bowl with a commercial rust remover — which also uses acids to change the chemical structure and found it didn’t work a lot better even though at £4.50 it was more expensive."

Read more: http://www.dailymail.co.uk/femail/a...ke-old-wives-cleaning-tips.html#ixzz3YlwlmDnh
Follow us: @MailOnline on Twitter | DailyMail on Facebook
 
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