Potassium dichromate

Into potassium dichromate has ngamagama amaningana,, ngezinga elikhulu noma elincane of imvamisa, asetshenziswa kuye emkhakheni ukusetshenziswa ketshezi uqobo. Ngokwesiko, imfundiso amakhemikhali evame ukusetshenziswa kakhulu igama dichromate potassium noma potassium Chrompick. Uma kuziwa angasetshenziswa ezimbonini, kuyilapho le kwakwakhe kwabizwa ngokuthi Chrompick. Kubalulekile kakhulu ukuqonda ngqo onjani uxhumano okukhulunywa ngakho, ngoba lusetshenziswa nsuku zonke Chrompick nayo okuthiwa i-sodium dichromate ifomula Na2Cr2O7 * 2H2O. ifomula Chemical potassium bichromate - K2Cr2O7.

Izakhiwo potassium bichromate elandelayo. Ngaphandle, abaprofethi bamanga yalolu ketshezi kuyinto zinhlayiya orange-ezinemibala, crystal ngehele okuyinto variable ngaphansi kwethonya lokushisa. Lapho yayo 257 ° C ngehele triclinic ine uhlobo zinhlayiya olulodwa, futhi lapho izinga lokushisa likhuphuka ngenhla 257 ° C, ishintsha ifomu monoclinic.

Potassium dichromate izidakamizwa has a lokushisa ukuncibilika 396 ° C, ngokwanda yayo phezu 500 ° C ubola izidakamizwa ku K2CrO4, Cr2O3 nomoya-mpilo. Potassium bichromate adonsela phansi Specific kuyinto 2,69 g / cm3. Potassium dichromate kakhulu oncibilikayo izixazululo aqueous:

- ezingeni lokushisa 0 ° C, amagremu 100 amanzi siphela ngokuphelele 4.6 amagremu potassium bichromate;

- ezingeni lokushisa 25 ° C, ubuningi efanayo yamanzi kungenziwa oncibilikiswe ngokuphelele kakade 15.1 amagremu, futhi izinga lokushisa kuvuselwa 50 ° C - kuyinto 37,7 amagremu.

Ngo alcohols, isib, i-ethanol, i-potassium dichromate kancane oncibilikayo.

Potassium bichromate yakha eutectic - esiyinhlanganisela ketshezi isixazululo okuyinto crystallizes ngaphansi lokushisa elincane leli qembu izinto ifomula ikhipha compositional zazo - H2O - K2Cr2O7 potassium bichromate okuqukethwe 4,30% ngesisindo. Amazinga ukuncibilika lokhu kwakwakhe 0,63 ° kuphela C no abilayo nganoma 104,8 ° C (potassium bichromate e isixazululo - 52% ngesisindo).

C ezihilela izinto ezifana potassium dichromate, ukusabela zenzeke kwi-esidi, uma liqukethe isixazululo aqueous. Into ngokwayo ubuye ejenti enamandla oxidizing, kwenta sibonelo, ngekuletsa ukusabela potassium bichromate nesibabule etholwe K2SO4 usawoti kanye chromium oxide.

Ngu basabela nge sulfuric futhi nitric acid potassium bichromate polihromaty amafomu. Lapho amalahle Izingxube equkethe lokhu lemagalagala hydrogen peroxide etholakala kalula alufakwa zinhlayiya peroxide okuyinto yena, kuyingxenye ebalulekile iziqhumane.

Ngokuphakeme ezimbonini bichromate potassium ukulungiselela Kwenziwa exchange ukuphendula Na2Cr2O7 KCl, lapho ikhambi eliwu lokushisa omkhulu - mayelana 1000 - 1300 ° C.

isetshenziswa potassium dichromate, izakhiwo amakhemikhali ezichazwe ngenhla womshini udayi ezahlukene yendwangu kanye lesikhumba izimboni, isetshenziswa ukushuka isikhumba. isicelo Okusatshalalisiwe ngokhuni ukucutshungulwa nokukhiqizwa okufanayo, womshini pyrotechnic Izingxube izithombe. Uma potassium potassium bichromate ziyoncibilika sulfuric acid, inikeza isixazululo ngempumelelo kakhulu uma begeza ingilazi amathuluzi egunjini lokucwaninga esibhedlela. Njengoba isakhi we bichromate potassium potassium esetshenziswa electrolyte owomile kanye inqubo yokusansimbi nokugqwala inhibitor izinsimbi kanye Alloys yabo.

Chrompick potassium - i egcekeni enobuthi kakhulu. Amaconsi isixazululo yalo, ewela ezindaweni wadalula yomzimba, abhubhise isikhumba. Ngisho lokuhlala encane yalolu ketshezi kungabangela umonakalo omkhulu ipheshana zokuphefumula nokulimaza nezicubu uqwanga umsipha. Ezimweni eyaziwayo ukulimala kwezinso, isibindi kanye pheshana emathunjini. Ngakho-ke, ukwenziwa kwemisebenzi potassium dichromate kufanele ngokuqinile nokuqalisa siphephe. Ikakhulukazi kufanele uqikelele ukuthi ukuvikela umgudu wokuphefumula nesikhumba.