Be-fore we an-swer the ques-tion con-cern-ing meth-ods of the syn-the-sis of Copper Chloride Dihydrate(WSDTY) in this ar-ti-cle, we should note that cop-per chlo-ride can be bi-va-lent, with the for-mu-la Cu-Cl?, and mono-va-lent, with the for-mu-la CuCl. Nat-u-ral-ly, be-cause of their dif-fer-ent quan-ti-ta-tive com-po-si-tion, they have dif-fer-ent prop-er-ties and fields of ap-pli-ca-tion. There-fore, meth-ods for the syn-the-sis of these sub-stances also dif-fers.

In nat-u-ral con-di-tions (i.e. in na-ture) this com-pound is en-coun-tered in the form of the rare min-er-al eri-ochal-cite (the chem-i-cal com-po-si-tion of the crys-talline hy-drate Cu-Cl?·2H?O – crys-tals of a blue col-or).As bi-va-lent cop-per chlo-ride has im-por-tant prac-ti-cal sig-nif-i-cance, the min-er-al found in na-ture is not suf-fi-cient to sat-is-fy de-mand for it, and for this rea-son nu-mer-ous meth-ods for the ar-ti-fi-cial syn-the-sis of this sub-stance have been de-vel-oped.

The main in-dus-tri-al method of syn-the-sis of bi-va-lent cop-per chlo-ride is the re-ac-tion of the chlo-ri-na-tion of cop-per sul-fide at a high tem-per-a-ture (300-400 °C). The equa-tion is:CuS + Cl? = Cu-Cl? + S.An al-ter-na-tive method for the syn-the-sis of bi-va-lent cop-per chlo-ride is chlo-ridiz-ing roast-ing (at a tem-per-a-ture of at least 500 °C):CuS + 2Na-Cl + 2O? = Cu-Cl? + Na?-SO?.

The above re-ac-tions re-quire spe-cial-ized equip-ment and strict safe-ty mea-sures – for this rea-son they are only used in in-dus-try. How-ev-er, cop-per chlo-ride is fre-quent-ly used in var-i-ous types of work in the lab-o-ra-to-ry, so we should know how this sub-stance can be ob-tained in the lab-o-ra-to-ry.