why buffer solution is necessary for pH metric titration?
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The word buffer is used to describe this solution, since it has the ability of being able to resist dramatic changes in pH upon addition of either a strong acid or a strong base. The conjugate base A- will react with any strong acid added while the weak acid HA will react with any strong base added.
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Buffer solutions are used to calibrate pH meters because they resist changes in pH. ... They are easily prepared for a given pH. They are stable for long periods of time. They resist changes in pH if you accidentally add a little acid or base or even water.
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