I-Sodium Cyanide: Intshayelelo yeePropati zayo zeMichiza kunye neendlela zokusabela

Sodium i-cyanide (I-NaCN) yikhompawundi ebaluleke kakhulu ye-inorganic enoluhlu olubanzi lwezicelo kuwo wonke amashishini ahlukeneyo, kodwa ikwadume ngobutyhefu bayo obugqithisileyo. Ukuqonda kwayo Iimpawu zeMichiza kunye neendlela zokusabela zibalulekile kulawulo olukhuselekileyo, ukusetyenziswa okusebenzayo, kunye Ukukhuselwa kwendalo. Esi sithuba seblogi sijolise ekunikeni isishwankathelo esibanzi sale miba.

Iipropati zeMichiza yeSodium Cyanide

Isodium cyanide yinto eqinileyo emhlophe, eyikristale enyibilika kakhulu emanzini, yenze isisombululo esinamandla sealkaline. Ukunyibilika kwayo emanzini kubalelwa kubume be-ionic bekhompawundi. Kwimeko eqinile, i-NaCN iqukethe i-sodium cations (Na⁺) kunye ne-cyanide anions (CN⁻) ebanjwe kunye neebhondi ze-ionic. Xa inyibilika emanzini, ezi ion ziyahlukana, zivumela ikhompawundi ukuba inyibilike ngokukhawuleza. Inkqubo yokupheliswa inokumelwa yinxaki: NaCN(s) → Na⁺(aq) + CN⁻(aq).

Oku kunyibilika kunika Isodium cyanide ukushukuma okuphezulu kwiindawo ezinamanzi, ezinezicelo ezisebenzayo kunye neempembelelo zokusingqongileyo. Ngokomzekelo, kwimigodi yegolide, indalo enyibilikayo ye-NaCN iyenza ikwazi ukwenza ii-complexes ezine-ion zegolide, iququzelela ukutsalwa kwegolide kwi-ore. Nangona kunjalo, ikwathetha ukuba ukuba ayilawulwa kakuhle, Isodium cyanide inokungcolisa imithombo yamanzi ngokulula.

Ngokumalunga neempawu zomzimba, sodium cyanide inomlinganiselo ophezulu wokunyibilika ongu-563.7 °C kunye neqondo lokubila elingu-1496 °C. Ezi ndawo ziphezulu zokunyibilika kunye nokubilisa ziluphawu lweekhompawundi ze-ionic, ezifuna isixa esibalulekileyo samandla ukuqhawula iibhondi ze-ionic ezinamandla ezibambe iiyoni kunye.

Enye ipropathi ebalulekileyo yeekhemikhali ye-sodium cyanide yi-reactivity yayo kunye ne-acids. Xa i-sodium cyanide idibana neeasidi, isabela ngokukhawuleza yenze i-hydrogen cyanide (HCN), igesi eyityhefu kakhulu kunye nerhasi. Ukusabela nge-asidi eqinile, njenge-hydrochloric acid (HCl), ingabhalwa njenge: NaCN + HCl → NaCl + HCN↑. Le ndlela yokusabela ibalaselisa ubungozi obukhulu obunxulunyaniswa nesodium cyanide, njengoko nentwana yeasidi inokubangela ukukhutshwa kwegesi ebulalayo yehydrogen cyanide.

Iindlela zokusabela zeSodium Cyanide

Enye yezona ndlela zaziwa kakhulu zokusabela ezibandakanya i-sodium cyanide kukusetyenziswa kwayo kwisinyithi esintsonkothileyo, ngakumbi xa kutsalwa iintsimbi ezixabisekileyo njengegolide nesilivere. Inkqubo yaziwa ngokuba yi-cyanidation. Phambi kweoksijini kunye namanzi, i-sodium cyanide iphendula kunye negolide kwi-ore ukwenza igolide enyibilikayo - icyanide complex. Ukusabela ngokubanzi ngokukhutshwa kwegolide kunokumelwa ngolu hlobo: 4Au + 8NaCN + O₂ + 2H₂O → 4Na[Au(CN)₂] + 4NaOH.

Inkqubo iqala ngokufakwa kwegolide ngeoksijini xa kukho iiyoni zecyanide. Iiyoni zecyanide emva koko zibophelela kwiiyoni zegolide ezineoksidi, zenze i-stable, amanzi - enyibilikayo idicyanoaurate(I) complex [Au(CN)₂]⁻. Le ndlela yokusabela entsonkothileyo iyinyibilikisa kakuhle igolide, ivumela ukuba yahlulwe kwi-ore matrix. Amanyathelo alandelayo abandakanya ukubuyiswa kwegolide kwisisombululo ngeendlela ezahlukeneyo, ezifana nemvula kunye ne-zinc okanye i-electrolysis.

I-sodium cyanide ikwabandakanyeka kwiimpendulo zokutshintshwa kwe-nucleophilic. I-cyanide anion (CN⁻) yi-nucleophile enamandla ngenxa yokubakho kwesibini see-electron kwi- ICarbon iathomu. Kwi-organic chemistry, umzekelo, inokusabela kunye ne-alkyl halides (R - X, apho i-X iyi-halogen) kwi-SN₂ eqhelekileyo (i-bimolecular nucleophilic substitution). Iskimu se-reaction ngokubanzi yile: R - X + NaCN → R - CN + NaX. Kule reaction, i-cyanide anion ihlasela i-carbon atom ebotshelelwe kwi-halogen ukusuka ngasemva, isusa i-halogen atom kwaye yenze i-carbon-carbon bond entsha kwimveliso ye-nitrile (R - CN). Le reaction ibaluleke kakhulu ekuhlanganisweni kwee-organic compounds ezahlukeneyo, kubandakanya amayeza kunye neekhemikhali ezintle.

Ukongeza, i-sodium cyanide inokungena kwi-hydrolysis emanzini. I-cyanide anion isabela kunye neamolekyu zamanzi ukwenza i-hydrogen cyanide kunye ne-hydroxide ion. Ukusabela kwe-hydrolysis ngolu hlobo lulandelayo: CN⁻ + H₂O ⇌ HCN + OH⁻. Le ndlela yokusabela iyabuyiswa kwaye iphenjelelwa zizinto ezifana ne-pH. Kwizisombululo ezisisiseko, i-equilibrium itshintshela kwi-reactants, icinezela ukubunjwa kwe-hydrogen cyanide. Nangona kunjalo, kwiimeko ze-acidic okanye ezingathathi hlangothi, ukubunjwa kwe-HCN kuyathandeka ngakumbi, okuphinda kugxininise imfuno yokulawula i-pH efanelekileyo xa kusingathwa izisombululo ze-sodium cyanide.

Iingqwalasela zoKhuseleko nokusiNgqongileyo

Ngenxa yobume bayo obuyityhefu kakhulu, imigaqo engqongqo yokhuseleko kufuneka ilandelwe xa kusingathwa i-sodium cyanide. Abasebenzi ababandakanyekayo kwimveliso, uthutho, okanye ukusetyenziswa kwayo kufuneka baxhotyiswe ngezixhobo ezifanelekileyo zokuzikhusela (PPE), kubandakanya iiglavu, iimaski, kunye nempahla yokukhusela. Kwimeko yokuchitheka okanye ukuvuza, uthintelo olukhawulezileyo kunye nemilinganiselo yokunciphisa ibalulekile. Ngokuqhelekileyo, i-sodium cyanide inokuthi ingathathi hlangothi ngokuyiphendula kunye nee-oxidizing agents ezinamandla, ezifana nezisombululo ze-hypochlorite, eziguqula i-ion cyanide zibe yimveliso enetyhefu encinci.

Ukususela kumbono wokusingqongileyo, ukukhululwa kwe-sodium cyanide kwindawo engqongileyo kunokuba nemiphumo emibi. Njengoko kukhankanyiwe ngaphambili, ukunyibilika kwayo emanzini kuyayivumela ukuba ingcolise amanzi, nto leyo ebeka isoyikiso kubomi basemanzini. Ngaphezu koko, ukwakheka kwerhasi yehydrogen cyanide kunokuchaphazela umgangatho womoya kwindawo yokuchitheka. Ngoko ke, amashishini asebenzisa i-sodium cyanide kufuneka afezekise ulawulo olungqongqo lwenkunkuma kunye neenkqubo zonyango zokunciphisa impembelelo yayo yokusingqongileyo.

Ukuqukumbela, i-sodium cyanide iyikhompawundi eneempawu ezizodwa zeekhemikhali kunye neendlela ezahlukeneyo zokuphendula. Ngelixa idlala indima ebalulekileyo kwiinkqubo ezahlukeneyo zemizi-mveliso, ubuthi bayo obugqithisileyo kunye neengozi ezinokubakho zokusingqongileyo zifuna ukuphathwa ngononophelo nolawulo. Uphando oluqhubekayo kunye nophuhliso lweendlela ezizezinye ezikhuselekileyo kunye neendlela zonyango ezisebenzayo ngakumbi kwinkunkuma enxulumene nesodium cyanide zibalulekile kushishino oluzinzileyo.