Task: Translation
Input (Czech): Zp sob v²roby vodn ho roztoku hydroxidu sodn ho elektrodial²zou vodn ho roztoku (15) sodn  soli v elektrodialyza n m  l nku (1), ve kter m se mezi anodu (3) a katodu (4) nainstaluje kationtov  membr na  (6) a dv  bipol rn  membr ny (5, 7), um st n  z obou stran kationtov  membr ny (6), p°i em  ka d  z membr n je sv²m aniontov²m povrchem orientov na k anod ; za pou it  vodn ho roztoku sodn  soli, odvozen  od kyseliny, kter  m  pK p°i 25 .degree.C ni Ü  ne  6,35; kter² se z sk v  pr chodem vodn ho roztoku uveden  kyseliny a vodn ho roztoku uhli itanu sodn ho z opa n²ch stran p°es kationtovou membr nu (6).\
Output (English): Method for the preparation of aqueous sodium hydroxide solution by electrodialysis of an aqueous solution (15) of sodium salt in an electrodialysis nml (1) in which a cation membrate (6) and two bipol are installed between the anode (3) and cathode (4) rn membres (5, 7), on both sides of the cationic membranes (6), on the membrn is its anionic surface on the anodes; using an aqueous solution of sodium salt derived from an acid having a pH of about 25 degrees centigrade and not about 6.35; from an aqueous solution of the acid and aqueous sodium carbonate solution from the other side through the cationic membrane (6). \ t