A 1.461g. sample containing k2so4, nh4no3, and inert materials was dissolved in sufficient water to give exactly 250ml of solution.a 250ml aliquot of this solution yeilded 0.2999g. of precipitate that consisted of (c6h5)4bk (fw=358g/mol) and (c6h5)4bnh4 (fw=337g/mol)upon being treated with an excess of sodium tetrephenylboron (C6h5)4bna. a 50.00ml. aliquot of sample was made alkaline and warmed to drive off ammonia.