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A buffer solution is made by dissolving .17g of ammonia and 1.07g ammonium chloride in enough...

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Chemistry

A buffer solution is made by dissolving .17g of ammonia and1.07g ammonium chloride in enough water to make 250mL ofsolution

Detemine molarity of ammonium chloride

Detemine ammonium concentration

Determin solution molarity relative to ammonia

Determine solution pH

Answer & Explanation Solved by verified expert
4.4 Ratings (751 Votes)

molarity of NH4Cl   = W*1000/G.M.Wt * volume of solution in ml

                              = 1.07*1000/53.5*250

                               = 0.08M

molarity of NH3      = W*1000/G.M.Wt * volume of solution in ml

                               = 0.17*1000/17*250

                              = 0.04 M

POH   = PKb + log[NH4Cl]/[NH3]

             = 4.75 + log0.08/0.04

              = 4.75 + 0.3010

              = 5.051

PH       = 14-POH

               = 14-5.051

                = 8.949
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