How do you prepare 1 normal EDTA solution?

from ethylenediamine (1,2-diaminoethane), formaldehyde, and sodium cyanide.[ This route yields the sodium salt, which can be converted in a subsequent step into the acid forms:H2NCH2CH2NH2 + 4 CH2O + 4 NaCN + 4 H2O → (NaO2CCH2)2NCH2CH2N(CH2CO2Na)2 + 4 NH3(NaO2CCH2)2NCH2CH2N(CH2CO2Na)2 + 4 HCl → (HO2CCH2)2NCH2CH2N(CH2CO2H)2 + 4 NaCl