| |
19 Mar 2009, 6:52 PM
| #1 (permalink) |
| Assistant Member HSC: 2009 Gender: Female Location: Wambi
Join Date: May 2008
Posts: 94
Last Activity:
17 Dec 2009, 10:51 AM  |  Can you have a -ve pH or a pH value of above 14??? You can hide this advertisement by registering. I had a question that read, caluclate the pH of a solution in which [H30+] is 1.3 mol/Lusing -log (1.3) i got the negative answer -0.11. Is this correct? Another question read, calculate the pH solutuons in which [0H-] is 1.2 mol/L using -log (1.2) = -0.079 and then [H+] = 14- -0.079 = 14.08. Is this correct? 
__________________  Mathematics. Maths Ext 1. English Advanced. Eng Ext 1. Modern History. Ancient History. Chemistry. |
|  |
|
19 Mar 2009, 7:30 PM
| #2 (permalink) |
| Prophet 9 HSC: 2009 Gender: Male Location: Sydney
Join Date: Aug 2008
Posts: 3,093
Last Activity:
Yesterday, 5:38 PM   | Re: Can you have a -ve pH or a pH value of above 14??? think so
__________________ High '09 ~ Sydney Boys High School 2009 B Science (Adv. Mathematics) @ UNSW  “Work smart. And when it is smart to work hard, work hard too” |
|
| |
|
19 Mar 2009, 11:41 PM
| #3 (permalink) | |
| Senior Member HSC: 2005 Gender: Male Location: Newcastle
Join Date: Jun 2004
Posts: 252
Last Activity:
4 Mar 2010, 9:00 PM | Re: Can you have a -ve pH or a pH value of above 14??? Quote:
Hydrogen chloride gas is soluble in water upto 720 g.L-1 C = (m)(V) / (F) C = (720)(1.000) / (36.46) C = 19.75 mol.L-1 pH = -log(19.75) pH = -1.30 The strongest known acid is Fluroantimonic acid which can have a pH as low as -25. | |
|
| |
|
19 Mar 2009, 11:54 PM
| #4 (permalink) |
| New Member HSC: 2009 Gender: Male Location: Sydney, NSW
Join Date: Oct 2008
Posts: 20
Last Activity:
7 Mar 2010, 5:36 PM | Re: Can you have a -ve pH or a pH value of above 14??? yeah you can because an acid with pH 0 has 1M of acid, so if there is more than 1M of acid, pH will be negative
__________________ 2U Adv. English, Maths Ext. 1, Maths Ext. 2, Physics, Chemistry, 1U SOR |
|
| |
 |
| Bookmarks |
| Thread Tools | |
| Rate This Thread | |
| |
