Imfundo:, Isayensi
I-calcium sulphate. Incazelo
Esimweni samakhemikhali engavamile, ukuhlukaniswa kosawoti, ukusebenzisana nezakhiwo zezinto kanye nezinhlanganisela zabo ezihlukahlukene kubaluleke kakhulu. Kunezinto ezithatha izindawo ezikhethekile phakathi kwabanye. Ama-compounds anjalo, ikakhulukazi, kufanele afake i-calcium sulphate. Ifomu yezinto eziphilayo CaSO4.
Ezimweni zemvelo zemvelo, idiphozi ye-amaminerali ene-CaSO4 2 H2O iyatholakala. I-calcium sulphate itholakala nasolwandle (cishe ngamathani angu-1800 000 ngamamitha ayi cubic) namanzi amasha.
I-Anhydride CaSO4 iyi-powder emhlophe ene-2.90-2.99 amagremu ngamentimitha angu-cubic ngalinye. Le nhlanganisela ithatha umswakama emoyeni. Ngenxa yalesi sakhiwo, i-calcium sulfate isetshenziswa njenge-desiccant.
Ekushiseni kwamadirethi ayizinkulungwane eziyikhulu namashumi amahlanu isisulu siyancibilika futhi sidilika. I-solubility yezinto ezibonakalayo ithuthukiswa phambi kweHCl, HNO3, NaCl, MgCl2. I-sulphate ye-calcium iphendula nge- sulfuric acid, uma i-sintered ne-carbon ibuyiselwa.
Ukuba ngamanzi kanye ne-MgSO4 ne-MgCl2, i-CaSO4 inika ukuqina okuqhubekayo. Ukunciphisa uketshezi ketshezi kungenzeka ngosizo lwama-reagents. Ukunciphisa ubulukhuni bamanzi kusekelwe ekusungulweni kwezinto ezicebisiwe kuma-anions alo.
Hlulela nge-2CaSO4 H2O - alabaster (ukushiswa gypsum) - isetshenziselwa ukwenza izibophezelo. Lezi zinto ziyi-powdery compounds, lapho, lapho ixubene namanzi, i-plastic mass isakhiwo kuqala bese iqinisa umzimba. Ukukhiqizwa kwe-alabaster kwenziwa ngenkathi kukhishwa i-gypsum ngaphansi kwethonya lokushisa kusuka emazingeni ayikhulu namashumi amahlanu kuya kwangukhulu namashumi ayisikhombisa. Le ndawo isetshenziselwa ukukhiqizwa kwezindonga zokwahlukana kanye nama-slabs, izinto ezikhungethweyo, kanye nokwehla.
I-gypsum yemvelo ingasetshenziswa njengezinto zokuqala ekukhiqizeni isamende ne-sulfuric acid ngendlela ehlanganisiwe.
I-calcium sulfate yemvelo ingasetshenziswa njenge-desiccant ekuhlaziyweni kwama-organic compounds. I-anhydrous compound iyakwazi ukuthatha umswakama 6.6% kusukela kulo lonke ubukhulu. I-calcium sulphate nayo isetshenziswa ekukhiqizeni izinto zokushisa ezishisayo.
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