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8 Jan 2006, 8:27 PM
| #1 (permalink) |
| Assistant Member HSC: 2006 Gender: Male
Join Date: Oct 2005
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16 Aug 2009, 8:59 PM  |  Conjugate Acid/Base strength. You can hide this advertisement by registering. I understand that a Strong (acid,base) forms an extremely weak (acid, base) but I'm a little bit confused on what weak (acids,bases) form.One textbook is saying a weak(acid, base) forms a moderately weak (acid or base). Whilst another is saying, for example, a weak base forms a strong acid. Not sure which one to trust, although the textbook which says a weak base forms a strong acid is a bit untrustworthy...... |
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8 Jan 2006, 8:37 PM
| #2 (permalink) |
| Love Addict - Nakashima  HSC: 2005 Gender: Female
Join Date: Jan 2005
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21 Jun 2006, 12:36 PM  | Welcome to BoS, Ioup.  The conjugate base of a strong acid is an extremely weak base. This means the acid ionises completely in water (let's just call 99.9% ionisation "complete"). Consequently the conjugate bases do not react significantly to form the acid molecule again. The conjucate base of a weak acid is a weak base. So both acid and base react with water to a certain extent. If the conjugate base reacted as little as that of a strong acid, then the weak acid wouldn't be weak. It is the reverse reaction - that is, the reaction between the conjugate base and water - that reduces the acidity of the weak acid. The conjugate base of an extremely weak acid is a strong base. The base reacts with water to a greater extent than the acid, because if it didn't, the acidity of the solution would be high. Similarly, the conjugate acid of a strong base is an extremely weak acid, and the conjugate acid of a weak base is a weak acid. I hope I'm making sense.
__________________ uai :: 98.20 | b. pharmacy @ usyd | no more chemistry students til '07 Last edited by Dreamerish*~; 8 Jan 2006 at 8:40 PM. |
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