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17 Jul 2005, 2:34 PM
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31 Oct 2009, 1:04 AM    | Definitions of acid and base You can hide this advertisement by registering. Hello everybodyCan someone please help me with this point? Identify a range of salts which form acidic, basic or neutral solutions and explain their acidic, neutral or basic nature I dont really understand it. So a salt (produced from strong acid + weak base) forms has an acidic nature in solution? I really don't understand this point at all.. Thanks in advance.
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17 Jul 2005, 3:34 PM
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| Love Addict - Nakashima  HSC: 2005 Gender: Female
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21 Jun 2006, 12:36 PM | Quote:
Explain why after neutralisation, some salt solutions are neutral, while others are acidic or basic. Basically, this is asking you to talk about how weak acid + strong base = basic salt, etc. Strong acid + Strong base = Salt solution of pH=7. Strong acid + Weak base = Salt solution of pH<7. Weak acid + Weak base = Salt solution of pH=7. Weak acid + Strong base = Salt solution of pH>7. (Strong acids: HCl, HNO3, H2PO4.Weak acids: CH3COOH, HNO2, C6H8O7. Strong bases: NaOH, KOH. Weak bases: NH3.) Hope that helped. 
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17 Jul 2005, 4:06 PM
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31 Oct 2009, 1:04 AM | Thank you very much.
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19 Jul 2005, 6:04 PM
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| chillin, killin, illin  HSC: 2005 Gender: Undisclosed Location: Where am I?
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26 Aug 2007, 5:05 PM | Does anyone know why this happens? eg. in a strong acid + weak base, the anion of the conjugate acid (of the weak base) acts as an acid and therefore the salt is acidic. Follow? Is this true? |
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19 Jul 2005, 8:43 PM
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21 Jun 2006, 12:36 PM | Quote:
When a strong acid reacts with a strong base, both conjugate acid and base are weak, therefore the salt solution is neutral. When a weak acid reacts with a weak base, both conjugate acid and base are strong, therefore the salt solution is neutral. When a strong acid reacts with a weak base, the conjugate base is weak, therefore the pH of the salt solution leans to the left of 7. When a weak acid reacts with a strong base, the conjugate acid is weak, therefore the pH of the salt solution leans to the right of 7. I'm quite sure I'm not wrong, hope that wasn't too confusing. 
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23 Jul 2005, 6:31 PM
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1 Oct 2008, 7:31 PM | Quote:
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23 Jul 2005, 9:38 PM
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17 May 2009, 2:11 PM | further, weak + weak should be ambiguous... not necessarily 7... usually u won't be titrating weak base vs weak acid any way...
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23 Jul 2005, 9:42 PM
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21 Jun 2006, 12:36 PM | Quote:
__________________ uai :: 98.20 | b. pharmacy @ usyd | no more chemistry students til '07 | |
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