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OpenStudy (anonymous):

What mass of ammonium chloride (fw 53.49) must be added to a 0.500L of 1.0M ammonia to prepare a buffer with a pH=9.50? For ammonia, Kb=1.8x10^-5, pKb=4.74

OpenStudy (vincent-lyon.fr):

From pH and pKb, can you worlk out the ratio [ammonia]/[ammonium ion] ?

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