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buffer

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buffer

In computing, a part of the memory used to store data temporarily while it is waiting to be used. For example, a program might store data in a printer buffer until the printer is ready to print it.

buffer

In chemistry, mixture of compounds chosen to maintain a steady pH. The commonest buffers consist of a mixture of a weak organic acid and one of its salts or a mixture of acid salts of phosphoric acid. The addition of either an acid or a base causes a shift in the chemical equilibrium, thus keeping the pH change to a minimum.

Each buffer system works only in a narrow pH range, so it is important to choose the right one for a given task. For neutral pH, (around pH 7.0), a mixture of the phosphates Na2HPO4 and NaH2PO4 would be suitable.



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? Mentioned in ? References in classic literature
 
I suppose, waiter,' he said, shaking his shock of hair, as a Newfoundland dog might shake his before sitting down to dinner, 'that a fair lodging for a single buffer might be found in these parts, eh?
The Mystery of Edwin Drood by Dickens, Charles View in context
The old buffer signed it like winking, directly he spotted the rum, but we ain't quite happy about it; you see, it ain't to be supposed that he's got a conscience, and there's only us saw him put his mark there.
A Millionaire of Yesterday by Oppenheim, E. Phillips View in context
I 've been an extravagant rascal, I know it, and I 'm thundering sorry, but that don't help a fellow, I 've got to tell the dear old buffer, and there 's where it cuts.
An Old-Fashioned Girl by Alcott, Louisa May View in context
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