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Buffers play an important role in pharmacy because they help in maintaining the pH of pharmaceutical preparations at a constant level. A buffer is a solution that resists sudden changes in pH when small amounts of acid or base are added. Most buffers consist of a weak acid and its salt or a weak base and its salt. The maintenance of proper pH is essential for __________ __________ _____ _____ ______ ________ _____ ________.
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