Clean It Up
UK Floor Cleaning Forum => Carpet Cleaning Forum => Topic started by: jeff1966 on November 12, 2007, 08:23:11 pm
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Interesting! www.parish-supply.com/phscale.htm
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When I went to carpt cleaning school it was known as Power of Hydrogen.
Shaun
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ME TOO :)
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that makes interesting reading, especially this bit;
the pH of carbonated cola soda (which contains phosphoric acid) is in the 2.5 range. A concentrated (35%) hydrogen peroxide solution has a pH of approximately 3.5. Carbonated cola soda may be slightly irritating to the eyes, causing no permanent damage. However, a 35% hydrogen peroxide solution will cause chemical burns to the skin or mucous membranes.
just shows PH isn't everything.
Mike
ps its was 'potential' at my school, but it was a 'grammar' school not the rough schools you two attended
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ps its was 'potential' at my school, but it was a 'grammar' school not the rough schools you two attended
Mike dont you mean " What school we went" :D
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It's always been known as Potential Hydrogen.
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Another Toff :o
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I think we have already worked that one out Glyn,
Like your known as Patential H*&^%& er ;D
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I guess I don't go back as far as you old uns.
Shaun
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Where's Doug when you need him. No booze in the house so I'm just waiting for his reply so I can print it off, get into bed, read it, and fall asleep straight away ;D
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Was always taught that this was the concentration of protons in a solution, expressed as a negative logarithm, in moles per litre.
But then I only went to Public School
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Please someone explain what is the power/potential of hydrogen?
I'm lost ???
Kind regards,
Jason.
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Jas its just the extention of the letters P H (ph) ;D
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Cheers Paul can sleep tonight now ;)
All the best,
Jason.
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I never went to school :-X
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Hi Guys,
pH is a measure of the hydrogen ion concentration.
In water there are water molecules H2O, Hydrogen ions H+ and OH- ions.
The H and OH ions are always in equilibrium, so that if you have more H you have to have less OH, pH is a measure of where you are at on the H/OH equilibrium.
So add acid to water and it increases H ions so pH is lower, add a base and it reduces H ions thereby increasing pH.
In reality pH is just one aspect of the chemistry and the hydrogen peroxide example is comparing a highly oxidising reaction with one that is not.
Alkalinity ie.how highly buffered a solution is, is as, if not more important in cleaning terms than pH.
The CC training courses are obviously very basic, there's only so much can be covered in two days ;)
When you were taught chemistry at school you would start off with a basic definition and as you progressed, you would find that definition was simplistic and you would be given a more complex explanation and so on.
One of the things about science is it is fairly complicated , so it is relatively easy to make claims which people take on face value as they do not know any better. As the person becomes more knowledgeable he starts to challenge things and realises its much more complex.
You will not find many scientists talking about the greatest product ever, Jesus in a bottle, etc etc as these are meaningless emotional terms which have little to do with science.
Hope this is not to boring but it really isn't something which can be accureately described in 2 sentences.
Cheers
Doug
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Hi Guys
Looks like I killed this topic ::)
Cheers
Doug
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Doug it started to hurt my brains reading it :).
Should re name the topic potential of Doug ;D
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Yes Doug you did
It was when you said that "science was complicated" , we hit the buffers. A phrase like that & carpet cleaners don't sit well together.
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Hi Guys
The reality is that you don't need to know this stuff, afterall you don't need to know about Nucleur Fission to switch a light on.
We are users and it's sufficent to know.
Dirt is largely acidic so cleaners are largely alkali
Higher alkali cleans better but is more likely to damage fibres especially wool and cause colour run.
I would suggest you start fairly neutral and work up the alkali scale as required.
Some fabrics are more sensitive to alkalis than carpets, do a colour test if not sure.
Rest assured that very few colour run problems occur if you use the recommended concentrations, resist the tempatation to increase the dosage unless you know what you are doing.
Cheers
Doug