pH control and phosphoric asid

You must work in some sort of chemical process setting. It surprises me that you misspelled acid, though. I'm afraid I can't won't help you.

You don't give sufficient information to allow an informed answer.

Ask your acid supplier these type of questions. He might be able to help. He probably even knows what you are trying to do.

Any of those will do the job. Phosphoric ac. is the more widely used in food processing.

My main guess would be that both phosphoric and sulfuric acid both have low vapor pressure. This means that they don't produce as much fumes as hydrochloric acid. The other advantage is that both of these acids have more than one hydrogen that can be used. Sulfuric has two, and phosphoric has three hydrogens, and can therefore nutralize more caustic atoms per number of acid atoms added.

My friend Kumarr: Muriatic acid is used for pH control, typically in swimming pools. Muriatic acid is Hydrochloric acid. The choice of which acid to use depends on other considerations, such as interaction with other materials, like metals.

Sulphuric acid is commonly used for pH control of wastewater in the chemical industry. Phosphoric acid is used either in food processing or in special situations that require it.

Hi kumarr68,

Perhaps because your processing equipment is stainless steel. Chloride is bad for stainless steels.

Mike

Hi kumarr,

you screwed your request up as soon as you added "any other purpose 10% of phosphoric or sulfuric asid is used rather than hydrocloric asid.Why is so...i am wondering".

I think this is another _{^{'under-cover school project'}} otherwise you would have got the details of the spelling of Hydrochloric acid right and the 'Ph' sign correct (Upper-case P, lower-case h).

This is far too generic to be able to give a complete answer. You do not even say what type of work you do. There has been some suggestions that may help but note, they are all referencing the "Ph" part of the question.

Do some thinking and take a look at the Periodic Table. This gives Boiling Point, vapor points, freezing point, and a whole lot of other stuff that could give you the answer. And you can figure it out for yourself, yes really! Have some pride and do your own research. It is really satisfying, especially when you get it correct!

Good luck.

Confused by your pH comment. Checked Perry's, checked Wikipedia, they both have it as pH. I know it's a minor point, but where is this Ph assertion coming from? Chain-yanking on a perceived homework question?

Hi GJ,

I am 'yanking' no ones 'chain'. Me and other regulars here can usually see a 'homework' question 99% of the time. 'Yanking chains' is not my style!

If however you feel I have been unfair, by all means report me or write directly to admins Moose the writer of the bold piece below.

Click this link to write to admin.... Contact Admin

It is also 'Policy' on this site not to do homework for kids or others who should be learning and doing it themselves. Simple as that.

As you are a new member, can I suggest you check out the 'CR4 FAQS'.

["The standard response that we moderators give is that "CR4 is not a homework help site". Some will add a line or two about how giving the student the answer would be a disservice. After all, the student is in school (presumably) to learn how to think like an engineer - and not just to get a piece of paper called a diploma".

Moose.]

Yours is not the first and may not be the last to ask why I/we will not answer a particular post, "just because it is homework".

The bold phrase above was a reply I got in answer to my request yo the Admin of this site, and it speaks for itself.

If, as it at first seems, the OP's request, comes from someone who is dealing with a problem and want to find equilibrium by sorting out the Ph, and also gives the first impressions of someone who works with Acids a lot.

However, reading between the lines, and I say as much in my post, it does look like this person is asking me/us to do his school work. Doing so, he will not learn anything of how to deal with the hard and everyday things in life.

The OP spelled the chemical name wrong as he did the word "Asid".......Their spelling. Which points to the OP as a school homework hunter.

I agree it may be debatable as to the logic of using 'Ph' or pH. It just looks and feels correct to me to write 'Ph'. Perhaps because I have done it all my life. However as you will see above the spelling of the two main words should have been correct.

I am not being nasty here or in my previous posts, pushing someone onto there back foot puts them ready for a fight. They can't fight. So they put any anger into getting to do better and more effecting research. I am not saying I know it all! Far from it. And if you knew me you would realise I am definitely not a know it all and just sitting here laughing. That just is not the case at all.

As may also notice, I do give advice on how to find the answers the OP is looking for, by going to a Periodic Table site. That will give proper spelling, chemical name, and shortened version of same, and various BP (Boiling Points) FP (Freezing Points) etc which is studied will give the complete answer to the request.

If the Ph/pH thing worries you enough, perhaps I should change my chemical nomenclature

Take care.

I've lurked for a while and know that CR4 is not a homework site. I wasn't asking why you hadn't answered the question - I was solely chasing the source of the pH / Ph difference. That's it. I communicate with people professionally using things like pH, and if I am doing / have been doing it wrong, I wanted to know. Since you made a point of correcting the original poster for spelling it right according to Perry's, I wanted to follow up and find out what you might know that I didn't or don't. It appears that, in this instance, it's solely a personal preference thing for you. I found an ad hit on Google that did it in that fashion. It's a personal preference that I disagree with, as I was taught that the lowercase "p" prefix has a particular meaning - that the number that follows is the "anti-logarithm" of sorts of the item referenced after the "p", allowing for "pOH" to exist and meaning that the "H" is in fact the capital "H" of hydrogen's atomic symbol.

After posting, I realized that a post asking someone who's been kicking around here for a while and giving thorough, respectful answers if he was jerking somebody around was an improper comment. I am sorry for that.

Hi GJ,

I find this detail you have given in your post to be interesting, thank you. I have seen similar stuff after searching as well.

There is no need for you to apologise in anyway.

In my life I have never had or wanted anyone to run to for answers. I always found an answer to pretty much all I ever searched. Some answers were a shock, and no I will not give an example. And other answers I was forced to look for, or look for parts of an answer and say for instance, put together half a dozen pieces of research or more, and eventually finding an answer.

I only ever sort to find answers to my own worries and answer my mixed emotions and my foibles. When doing so there was no Computers and no one to ask and reason with. 'Finding' an answer, absorbing it if you like, is completely useless.

The fact that I was able to find succour in finding some answers to things I have always wondered about, or to complications set before me. Because of Metrication I wondered what the ratio was between Celsius and Fahrenheit. I had no books to work with just a few old envelopes and a pencil and sharpener. I found the ratio by working on it completely alone, and I only sought to use the information for myself but, since I found this ratio (BTW . 1 °C = 1.8 °F plus 32 °F) others around me have also asked "how" when apparently there was no connection.......

I went back as far as I could in Kevin and I did from having certain single temp's °K/°C/°F, I cannot recall how I did it with the Kelvin but I found it some how. Maybe there was a Kelvin tepm' in a news paper or something?

It is just too easy for what are obviously lazy people to just look for the answer to a question, use that answer, figure, whatever once and never pass on anything because they never had to learn it, they have not passed it onto others either.

I think my Motto at the bottom of each post says it all.

Take care.