A2.950 sample contalning NH,CI, Rb,CO, and Inert materlal was dissolved to give 250.0 ml of solutlon....

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A2.950 sample contalning NH,CI, Rb,CO, and Inert materlal was dissolved to give 250.0 ml of solutlon. A 50.00 ml allquot was acldified and treated with excess sodlum tetraphenyl borate Na'B(Ph), to precipitate Rb' and NH, lons completely: (Ph)4B + Rb* + (Ph)4BRB(s) (Ph)4 B +NH4 (Ph)4B NH4(s) The resulting precipitate weighed 1.234g. A fresh 100,00-ml aliquot of the original solutlon was made alkallne and heated to drive off all NH3. NH4 +OH NH3+ H20 It was then acidified: d treated with NaB(Ph)a to glve 1.108g of precipitate. Calculate the percentage of NH,CI and Rb;CO, In the ori Inal sample. (FW (Ph),BRb = 404.79, (Ph)4 BNH, = 337.24, Rb,CO, 184.52, NH,CI = 53.49) A2.950 sample contalning NH,CI, Rb,CO, and Inert materlal was dissolved to give 250.0 ml of solutlon. A 50.00 ml allquot was acldified and treated with excess sodlum tetraphenyl borate Na'B(Ph), to precipitate Rb' and NH, lons completely: (Ph)4B + Rb* + (Ph)4BRB(s) (Ph)4 B +NH4 (Ph)4B NH4(s) The resulting precipitate weighed 1.234g. A fresh 100,00-ml aliquot of the original solutlon was made alkallne and heated to drive off all NH3. NH4 +OH NH3+ H20 It was then acidified: d treated with NaB(Ph)a to glve 1.108g of precipitate. Calculate the percentage of NH,CI and Rb;CO, In the ori Inal sample. (FW (Ph),BRb = 404.79, (Ph)4 BNH, = 337.24, Rb,CO, 184.52, NH,CI = 53.49)