Potassium dichromate

Ukusetyenziswa potassium dichromate iye amagama eziliqela, leyo, ukuba iqondo elikhulu okanye elingaphantsi zobungakanani, ezisetyenziswa kuxhomekeke entsimini ukusetyenziswa kweziyobisi ngokwayo. Ngokwemveli, ithiyori eekhemikhali igama ezininzi ezisetyenziswayo kakhulu potassium dichromate okanye potassium Chrompick. Xa kuziwa ukusetyenziswa kwimizi-mveliso, ngelixa kulo compound okubizwa Chrompick. Kubalulekile kakhulu ukuba ukuqonda kakuhle ukuba uhlobo lonxibelelwano ekuthethwa, kuba ezisetyenziswa imihla ngemihla Chrompick nayo sodium dichromate ifomula Na2Cr2O7 * 2H2O. formula Chemical potassium bichromate - K2Cr2O7.

Iimpawu ezibonakalayo ze potassium bichromate elandelayo. Ngokwangaphandle, le nto i ziikristale-orenji-bala, ngumkhenkce Ilibele apho iyaguquguquka phantsi kwempembelelo lobushushu. Xa ixabiso layo ku 257 ° C triclinic emkhusaneni na uhlobo ziikristale abangatshatanga, yaye xa amaqondo obushushu kuyenyuka ngaphezu kwe 257 ° C, itshintsha ukuba uhlobo monoclinic.

into Ipotaziyam dichromate na iqondo lobushushu yokunyibilika a ka-396 ° C, neendyebo zawo phezu 500 ° C abole kweziyobisi K2CrO4, Cr2O3 neoksijini. Ipotaziyam bichromate gravity ngqo yi 2,69 g / cm3. Ipotaziyam dichromate enyibilikayo kakhulu izisombululo zolwelo:

- kubushushu ka-0 ° C, 100 grams yamanzi ithe yachithwa ngokupheleleyo 4.6 iigrem potassium bichromate;

- kubushushu-25 ° C, ubungakanani bamanzi songanyibilikisswa ngokupheleleyo sele 15.1 grams, kwaye ubushushu bavuselwa 50 ° C - i-37.7 grams.

Ngo-alkoholi, umz, ethanol, potassium dichromate emanzini kancinane.

Ipotaziyam bichromate yenza eutectic - isisombululo ulwelo edityanisiweyo leyo crystallizes phantsi ubushushu lincinci eli qela yezinto formula ezakheke compositional apho - H2O - K2Cr2O7 enesiqulatho potassium bichromate 4.30% ngokobunzima. Iqondo lobushushu inyibilikiswa yale ezimbaxa kuphela 0,63 ° C kunye abilayo ngayo kwi 104,8 ° C (potassium bichromate in isisombululo - 52% ngokobunzima).

C ezibandakanya ezifana izinto njengoko potassium dichromate, ukusabela kuqhutywa esidi, ukuba iqulathe isisombululo zolwelo. Iziyobisi ngokwayo kwakhona arhente eyomeleleyo oxidizing, umzekelo, ngokusebenzisa indlela potassium bichromate nesulfure wafumana K2SO4 ityuwa kunye chromium oxide.

Xa zakudibana asidi potassium Iifomu bichromate polihromaty sulphuric kunye ne-nitric. Xa amalahle imixube equlethe le ezimbaxa iperoksayidi yehidrojeni lufumaneka lula izidubedube ziikristale peroxide nto leyo, yinto yinxenye ebalulekileyo neziqhushumbisi.

Namuhla ukulungiselela bichromate potassium ikhutshwa phandle awasabela abelane Na2Cr2O7 KCl, apho Isisombululo ndinobushushu ubushushu kakhulu - malunga 1000 - 1300 ° C.

kusetyenziswa Ipotaziyam dichromate, iimpawu eekhemikhali echaziweyo ngentla ekwenziweni imibala eyahlukeneyo kumashishini textile neemfele, lisetyenziswa kwi kwezikhumba yesikhumba. isicelo Kuhanjiswa processing imithi kunye nokuveliswa yematshisi, eyimveliso pyrotechnic imixube imifanekiso. Ukuba potassium potassium bichromate unyityilikiswa sulphuric acid, inika isisombululo ziyasebenza izixhobo iglasi ukuhlamba elabhoratri. Njengoko njengenxalenye bichromate potassium potassium kusetyenziswa electrolytes kwindawo eyomileyo ngokunjalo kwinkqubo yokunyibilikisa isinyithi irusi inhibitor kunye aluminium zabo.

Chrompick potassium - elibona ayityhefu kakhulu. Ngamathontsi isisombululo yayo, esiwa kwimimandla ubuze lomzimba, atshabalalise isikhumba. Nkqu lamanani ezincinane weli kungabangela umonakalo omkhulu ukuya iphecana bokuphefumla umonakalo ijwabu intlala lungu. iimeko ezaziwayo nomonakalo wezintso, isibindi kunye iphecana zesisu. Ngoko ke, imveliso imisebenzi kunye potassium dichromate kufuneka basebenzise ngokungqongqo ukhuseleko. Sifanele nikunyamekele ukukhusela inkqubo yokuphefumla kunye nesikhumba.