Potassium dichromate

Umi potassium dichromate nwere ọtụtụ aha, nke, ka a ukwuu ma ọ bụ nta karị nke ugboro, na-eji dabere na ubi nke ojiji nke umi ya. Kemgbe ụwa, ndị chemical ozizi ndị akacha eji aha dichromate potassium ma ọ bụ potassium Chrompick. Mgbe ọ na-abịa ulo oru eji, ebe a compound kpọrọ Chrompick. Ọ dị ezigbo mkpa ịghọta kpọmkwem ụdị nke njikọ ahụ na ajụjụ, n'ihi na adị kwa ụbọchị eji Chrompick a na-akpọ sodium dichromate usoro Na2Cr2O7 * 2H2O. Chemical usoro potassium bichromate - K2Cr2O7.

The nkịtị Njirimara nke potassium bichromate na-esonụ. Atugharị, a umi bụ oroma-acha kristal, crystal lattice nke bụ agbanwe n'okpuru nduzi nke okpomọkụ. Mgbe ya uru 257 ° C triclinic lattice nwere n'ụdị otu kristal, na mgbe okpomọkụ adahade n'elu 257 ° C, ọ na-agbanwe a monoclinic ụdị.

Potassium dichromate umi nwere a agbaze okpomọkụ nke 396 ° C, na-ọmume-ya n'elu 500 ° C erekasịchaala umi na K2CrO4, Cr2O3 na oxygen. Potassium bichromate Specific ike ndọda bụ 2,69 g / cm3. Potassium dichromate bụ ukwuu soluble na okenye agbanwe agbanwe:

- na okpomọkụ nke 0 ° C, 100 grams nke mmiri na-kpamkpam etisasịwo 4.6 grams nke potassium bichromate;

- na okpomọkụ nke 25 ° C, otu mmiri buru ibu nwere ike kpamkpam etisasịwo ama 15.1 grams, na ọnọdụ okpomọkụ na-akpọlite 50 ° C - bụ 37,7 grams.

Na alcohols, e.g., ethanol, potassium dichromate ubé soluble.

Potassium bichromate Nleta a eutectic - mejupụtara mmiri mmiri ngwọta nke crystallizes n'okpuru nta okpomọkụ otu a nke bekee structurally compositional usoro nke - H2O - K2Cr2O7 na potassium bichromate content 4,30% site na ibu ibu. The agbaze okpomọkụ nke a compound naanị 0,63 ° C na esi ya na 104,8 ° C (potassium bichromate na ngwọta - 52% site na ibu).

C metụtara ndị dị otú ahụ bekee ka potassium dichromate, Jeremaya mere na-ebe ke acidic media, ma ọ bụrụ na o nwere okenye ihe ngwọta. Umi ya onwe ya bụ na-a siri ike oxidizing gị n'ụlọnga, n'ihi na ihe atụ, site na mmeghachi omume nke potassium bichromate na sọlfọ nwetara K2SO4 nnu na chromium oxide.

Site omume na igirigi ibu sulphuric na nitric asịd potassium bichromate polihromaty iche-iche. Mgbe kpo oku mixtures nwere a compound na hydrogen peroxide na-nwetara mfe mgbawa kristal peroxide nke, n'aka, bụ ihe dị mkpa akụrụngwa nke na-agbawa agbawa.

Industrially potassium bichromate nkwadebe a rụrụ site mgbanwe mmeghachi omume na Na2Cr2O7 KCl, na nke ihe ngwọta bụ kpụ ọkụ n'ọnụ na nnukwu okpomọkụ - banyere 1000 - 1300 Celsius C.

Potassium dichromate na-eji, ndị chemical Njirimara nke na-akọwara n'elu ke imewe nke dị iche iche e ji esiji ákwà na akwa na akpụkpọ anụ ụlọ ọrụ, ọ na-eji na tanning akpụkpọ anụ. Ekesa ngwa osisi nhazi na n'ichepụta nke ọkụ, imewe nke pyrotechnic mixtures foto. Ọ bụrụ na potassium potassium bichromate etisasịwo na igirigi ibu sulphuric acid, ọ na-enye a dị irè ngwọta maka ịsa iko ngwá na laabu. Dị ka a akụrụngwa nke potassium potassium bichromate eji electrolytes na akọrọ nakwa nkà mmụta banyere ígwè usoro nchara inhibitor ọla na ha alloys.

Chrompick potassium - nnọọ na-egbu egbu compound. Tụlee nke a ngwọta ya, na-ada na-gụrụ ebe ahụ, ibibi anụ. Ọbụna obere kasịnụ nke a umi nwere ike ime ka oké njọ mmebi nke akụkụ okuku ume na tract na imebi cartilage ọgọdọ anụ ahụ. Mara ikpe nke akụrụ mmebi, imeju na-na eriri afọ tract. Ya mere, na mmepụta nke ọrụ na potassium dichromate ga nditịm mejuputa nchebe anya. Karịsịa ga na-elekọta iji chebe akụkụ okuku ume na usoro na akpụkpọ.