Expermmtd data are reported m conformny wtth the Fuoss-Onsager theory for the ~soclatlorl of several common8" laro ammonmm tetrafluoroborate an i$ aphtc supportmg electrolytes m acetomtrrle. Tetra-ethylvalue for Ka pert orate are completely dtssocrated, yieldmg a small negatwe Sodium perchlorate (completely dtmoctated) and potassmm perchlorate (& = 12) are more extenswely dtssocrated than prevtously reported. Imphcattons of the assoctatron data for tetramethylammonium chlorrde and tetra-ethylammomum bromtde on metal-hahde eqml~brmm studres in acetomtrde are dwussed R&mm&Des dorm&es experrmentales sent p&se&es conformement a la theone de Fuoss-Onsager, propre 51 la Qssoctat:on de divers electrolytes supports polarographrques communs dans l'ac&omtrde. Le t&raSuoroborate et le perchlorate de t&ra&hylammomum sont completement drssoctes, dhotant une valeur lQ&rement negative pour KA. Le perchlorate de sodmm (compl&ement drssoctt) et le perchlorate de potassium (& = 12) sont plus dtssoct6s qu'ant6rmurement mdrque Dtscusston des rmphcattons des don&es d'assocratton propres au chlorure de t&ram&hylammomum et au bromure de tCtra&hylammomum, quant aux equrhbres m&al-halog6nure dans l'ac&omtnle Z---Man pr&entrert expertmentelle Daten zur Theorie von Fuoss-Onsager filr dte Drssoxtatron emtger, be1 der Polarographre m Acetomtril verwendeten Lertekktrolyte Tetraiithylammomum-tetrafiuoroborat turd perchlorat smd vollstilndig drssoxuert und ergeben emen klemen negattven wert fiir KA Natrmmperchlorat (volhg dtssoxiiert) und Kahumperchlorat (ZA = 12) sind st%rker dissoxuert ah frWer angegeben wurde. Man dtskuttert dte Redeutung der Assovattonsdaten ftlr Tetramethylammomumchlond und Tetra-&hylammomumbromtd betm Studmm der MetalHIalogemdX3letchge~chte m Acetomtrtl.