Potassium dichromate

Abu potassium dichromate yana da dama sunayen, wanda, zuwa mafi girma ko karami mataki na mita, ana amfani dangane da filin da amfani da abu kanta. A bisa ga al'ada, da sinadaran ka'idar da aka fi amfani da sunan dichromate potassium ko potassium Chrompick. Idan ya zo ga masana'antu amfani, alhãli kuwa wannan fili cinye Chrompick. Yana da matukar muhimmanci a fahimci hakikanin abin da irin haɗi a tambaya, domin a yau da kullum amfani Chrompick kuma ake kira sodium dichromate dabara Na2Cr2O7 * 2H2O. Chemical dabara potassium bichromate - K2Cr2O7.

The jiki Properties na potassium bichromate wadannan. Outwardly, wannan abu ne orange-canza launin lu'ulu'u, crystal raga na wanda shi ne m ƙarƙashin rinjayar zazzabi. Lokacin da darajar zuwa 257 ° C triclinic raga yana da nau'i na guda lu'ulu'u, kuma a lõkacin da yawan zafin jiki yakan sama 257 ° C, shi ya canjãwa zuwa monoclinic form.

Potassium dichromate abu yana da wani narkewa zafin jiki na 396 ° C, tare da karuwa fiye da 500 ° C decomposes abu a kan K2CrO4, Cr2O3 da oxygen. Potassium bichromate Specific nauyi ne 2,69 g / cm3. Potassium dichromate ne sosai narkewa a cikin ruwa-ruwa mafita:

- a zazzabi of 0 ° C, 100 grams na ruwa da aka gaba daya narkar da 4.6 grams na potassium bichromate.

- at zazzabi na 25 ° C, guda yawa na ruwa za a iya gaba daya narkar riga 15.1 grams, da kuma yawan zafin jiki ne tãyar da su da 50 ° C - shi ne 37.7 grams.

A alcohols, msl, ethanol, potassium dichromate dan kadan mai narkewa.

Potassium bichromate Forms eutectic - kumshin ruwa bayani wanda crystallizes a karkashin da karami da zazzabi ga wannan rukuni na abubuwa da fasali compositional dabara na wanda - H2O - K2Cr2O7 da potassium bichromate ciki 4,30% by nauyi. Da narkewa zafin jiki na wannan fili kawai 0,63 ° C da kuma ruwan da shi a 104,8 ° C (potassium bichromate a cikin bayani - 52% by nauyi).

C shafe irin wannan abubuwa a matsayin potassium dichromate, halayen faru a acidic kafofin watsa labarai, idan ta ƙunshi cikin ruwa-ruwa bayani. Abu da kanta ne kuma mai karfi da oxidizing wakili, misali, ta dauki na potassium bichromate da sulfur samu K2SO4 gishiri da chromium oxide.

By maida martani tare da sulfuric da nitric acid potassium bichromate polihromaty siffofin. Lokacin da dumama garwayayye dauke da wannan fili da kuma hydrogen peroxide an samu saukin fashewar lu'ulu'u peroxide wanda, bi da bi, shi ne wani muhimmin bangaren da nakiyoyi.

Industrially potassium bichromate shiri ne da za'ayi ta musayar dauki tare da Na2Cr2O7 KCl, a da bayani ne mai tsanani ga babbar zazzabi - game 1000 - 1300 ° C.

Potassium dichromate da ake amfani, da sinadaran Properties na wanda aka bayyana a sama a cikin yi da daban-daban dyes a yadi da kuma fata masana'antu, shi da ake amfani a tanning fata. Rarraba aikace-aikace a cikin itace aiki da kuma masana'antu na ashana, da yi na pyrotechnic garwayayye hotuna. Idan potassium potassium bichromate narkar da a sulfuric acid, shi ya ba mai matukar tasiri bayani don wanka gilashin kida a cikin dakin gwaje-gwaje. Kamar yadda wani bangaren na potassium potassium bichromate amfani Wutan a bushe kazalika a metallurgy aiwatar tsatsa mai hanawa karafa da su gami.

Chrompick potassium - wani musamman mai guba fili. Saukad da wani bayani daga gare ta, fadowa a kan fallasa yankunan na jiki, ya hallaka fata. Har ma da kananan yawa na wannan abu zai iya sa tsanani lalacewar da numfashi fili da kuma lalata guringuntsi jijiya nama. Known lokuta na koda lalacewa, hanta da kuma gastrointestinal fili. Saboda haka, samar da ayyukan tare da potassium dichromate kamata tsananin aiwatar da ranmu. Musamman kamata kula da kare numfashi tsarin da kuma fata.