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Topic: Buffer solutions  (Read 4849 times)

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Tom

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Buffer solutions
« on: June 08, 2004, 11:28:20 AM »
Which of these statements is not true of buffer solutions?

A buffer solution could consist of equal concentrations of ammonia and ammonium bromide.
   
A buffer solution could consist of equal concentrations of nitric acid, HNO3, and sodium nitrate.
   
A buffer solution will change only slightly in pH upon addition of acid or base.
   
In a buffer solution containing benzoic acid, C6H5COOH, and sodium benzoate, C6H5COONa, the species that reacts with added hydroxide ion is the benzoic acid.


Offline Mitch

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Re:Buffer solutions
« Reply #1 on: June 08, 2004, 12:53:11 PM »
True: A buffer solution will change only slightly in pH upon addition of acid or base.
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Tom

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Re:Buffer solutions
« Reply #2 on: June 08, 2004, 03:19:13 PM »
A buffer solution will resist change in ph when a moderate amount of an acid or base is added to it. A buffer solution consists of a weak acid and its conjugate base, or of a weak base and its conjucate acid.

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