BUFFER SOLUTIONS
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5 Terms
1
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what is a BUFFER?
* keeps pH CONSTANT when small amounts of acid or alkali are added
* a measure of the RESISTANCE TO pH CHANGE
* a measure of the RESISTANCE TO pH CHANGE
2
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BUFFER CAPACITY
a measure of the resistance to pH change
3
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what happens to the buffer capacity when pH IS EQUAL TO pKa OF A WEAK ACID?
* buffer capacity is at a MAXIMUM
* decreases appreciably as the pH extends more than 1 unit either side of the value
* decreases appreciably as the pH extends more than 1 unit either side of the value
4
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what happens when H+ ions from acid have been added to a solution?
an abundant supply of OH- ions are supplied to remove them
5
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what happens when OH- ions from a strong base have been added to a solution?
salt can supply H+ ions to react with any added
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