jazzoff Posted July 23, 2005 Posted July 23, 2005 Why do buffer solutions resist changes in pH? Please include appropriate chemical equations and calculations. Thank you, and pls reply ASAP, because it is very URGENT!
DQW Posted July 23, 2005 Posted July 23, 2005 An important bit that's missing in the Wiki article is the Henderson-Hasselbach equation. Google that separately.
Borek Posted July 23, 2005 Posted July 23, 2005 http://www.chembuddy.com/?left=pH-calculation&right=pH-buffers-henderson-hasselbalch Best, Borek -- Chemical calculators at www.chembuddy.com pH calculation concentration conversion
jazzoff Posted July 28, 2005 Author Posted July 28, 2005 Explain why the acidic or basic nature of this substance helps it to serve its purpose as a cleaning product and antacid. UREGNT or IT"S DUE TMR!
atinymonkey Posted July 28, 2005 Posted July 28, 2005 If you can't be bothered to read the descriptive links, at least put your demands in the homework section. http://en.wikipedia.org/wiki/Buffer_solution
jazzoff Posted July 28, 2005 Author Posted July 28, 2005 Thank you for your advice, but I don't like the way you are talking to me. I am just 14 and I don't understand what the links are talking about. They are too difficult for me. I really tried to understand the contents in the links. At least the others are more helpful. I am really hurt by your critical remarks.
jazzoff Posted July 28, 2005 Author Posted July 28, 2005 anyway, I have seen the link that you have given me. latentheat (the first person who replied to my question) already gave it.
atinymonkey Posted July 28, 2005 Posted July 28, 2005 Jesus. wikipedia.org Applications Their resistance to changes in pH makes buffer solutions very useful for chemical manufacturing and essential for many biochemical processes. Buffer solutions are necessary to keep the right pH for enzymes in many organisms to work. A lot of enzymes work only under very precise conditions, if the pH strays too far out of the margin the enzymes slow or stop working and the organism dies. A buffer of carbonic acid (H2CO3) and bicarbonate (HCO3-) is present in blood plasma, to maintain a pH between 7.35 and 7.45. Industrially buffer solutions are useful in fermentation processes, and for setting the correct conditions for the dyes used in colouring fabrics. So we see from wikipedia that Buffer solutions are used to stabalise solutions for enzymes to work. It's not a massive leap of logic to realise that cleaning products may use enzymes. A quick google returns over 200,000 results to look through and confims that there are enzyme based cleaning products. Now, lets look at antacid: - wikipedia.org Antacid An antacid is any substance, usually a base, that counteracts stomach acidity. It is taken by mouth to relieve heartburn, sour stomach, or acid indigestion. Most antacids buffer gastric acid, raising the pH to reduce acid damage. If antacids are ineffective, medication (H2-receptor antagonists or proton pump inhibitors) may relieve the symptoms. Poor response to medication may be a reason to suspect an underlying medical condition. Now, what does a buffer solution do? It stabilises PH. What does an Antacid do? It stabilises PH.
jazzoff Posted July 29, 2005 Author Posted July 29, 2005 That is very nice of you. And let me tell you, if you are going to write such vague answers in the exams, they are going to give you a zero. If you don't BOTHER to give answers, then please don't. I learn nothing and you are just wasting your time.
jazzoff Posted July 29, 2005 Author Posted July 29, 2005 It's all right to say that word in my face. But you have just shown the whole community how rude and uncivilised you are. I know you have a point in your advice, but that word ruins everything. I shall construct my own answers, as what you have said, and I just hope you never use that awful word again.
jazzoff Posted July 29, 2005 Author Posted July 29, 2005 Oh, I am glad you have removed that post of yours. Thanks .
Sayonara Posted July 29, 2005 Posted July 29, 2005 Thank you for your advice, but I don't like the way you are talking to me. Most of us have spent years in the education system, and we know perfectly well that you will not be tested on anything that you have not been (a) taught or (b) expected to self-study, so we're not terribly sympathetic.
anthropos Posted July 30, 2005 Posted July 30, 2005 nah, she's 14, jus leave her alone. but, jazzoff, I don't think it's a good idea to "flame" the forum. Don't care about what people say about you; some are just outspoken. Hmmm....I have read most of your posts, and I think you are rather sensitive to what people say about you. I sound like a grown-up, don't I? Hah, I am just 15 !
atinymonkey Posted August 1, 2005 Posted August 1, 2005 nah, she's 14, jus leave her alone. Him. Jacques is a boy, not a girl.
anthropos Posted August 1, 2005 Posted August 1, 2005 oh my god...i am sorry...! Didn't know he was called jacques......Didn't mean it, don't stare at me like that o_0
Dave Posted August 1, 2005 Posted August 1, 2005 Hi. Why do buffer solutions resist changes in pH? Please include appropriate chemical equations and calculations. Thank you, and pls reply ASAP, because it is very URGENT! Luckily for you, I didn't see this post sooner. However, I'd like to point out quite strongly that we don't provide homework answers on here. Demanding them from people is neither polite, nor does it serve your purpose. And let me tell you, if you are going to write such vague answers in the exams, they are going to give you a zero. If you don't BOTHER to give answers, then please don't. I learn nothing and you are just wasting your time. Comments like this make me quite annoyed. It is not enough that you want your homework done for you, but you don't expect nothing less than pristine answers written out in perfect examination style to better your chances at passing? Quite frankly, your lack of respect for other members of this board is astounding. That's not what SFN is all about. If you want your work done for you, then go elsewhere. I don't have time for this sort of rubbish. Thread closed.
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