{"id":1773,"date":"2011-07-07T15:35:39","date_gmt":"2011-07-07T12:35:39","guid":{"rendered":"http:\/\/www.islamidavet.com\/kutuphane\/\/?p=1773"},"modified":"2011-07-07T15:35:39","modified_gmt":"2011-07-07T12:35:39","slug":"krom","status":"publish","type":"post","link":"https:\/\/www.islamidavet.com\/kutuphane\/krom\/","title":{"rendered":"Krom"},"content":{"rendered":"<p>Sembol: Cr<\/p>\n<p>Atom numaras\u0131: 24<br \/>\nAtom a\u011f\u0131rl\u0131\u011f\u0131: 51.9961 g\/mol<br \/>\nOda ko\u015fullar\u0131nda (25\u00b0C 298 K):  G\u00fcm\u00fc\u015f\u00fcms\u00fc metalik kat\u0131<br \/>\nMetal<br \/>\nd-blok elementi<br \/>\nKadmiyum 1761 y\u0131l\u0131nda Johann Gottlob Lehmann\u2019\u0131n Ural da\u011flar\u0131nda rastlad\u0131\u011f\u0131 portakal-k\u0131rm\u0131z\u0131 renkli mineral ile oldu. Bu bile\u015fik krokoid olarak bilinen kur\u015fun kromatt\u0131r.(PbCrO4)<br \/>\n1770 y\u0131l\u0131nda Peter Simon Pallas bu bile\u015fi\u011fin boyac\u0131l\u0131kta pigment(renk veren madde) olarak kullan\u0131labilece\u011fini ke\u015ffetti.<br \/>\n1797 y\u0131l\u0131nda Nicolas-Louis Vauquelin kur\u015funlu kromat cevherinin HCl ile reaksiyonu sonucunda krom oksit (CrO3) elde etti . 1778 y\u0131l\u0131nda ise k\u00f6m\u00fcr f\u0131r\u0131n\u0131nda krom oksidin \u0131s\u0131t\u0131lmas\u0131 ile saf krom metalini izole etti.<br \/>\nFeCr2O4 cevherinin eritilmi\u015f alkali ile oksidasyonu sonucunda sodyum kromat Na2CrO4 elde edilir. Bu bile\u015fikteki krom +6 y\u00fckseltgenme basama\u011f\u0131na sahiptir. Cr+6 \u00e7\u00f6kt\u00fcr\u00fcl\u00fcr ve daha sonra karbon ile Cr(III) oksit (Cr2O3) e indirgenir. Krom(III) oksidin al\u00fcminyum veya silikon ile reaksiyonu sonucunda krom metali elde edilir.<br \/>\nCr2O3 + 2Al \u00e0 2Cr + Al2O3<br \/>\n2Cr2O3 + 3Si \u00e0 4Cr + 3SiO2<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sembol: Cr Atom numaras\u0131: 24 Atom a\u011f\u0131rl\u0131\u011f\u0131: 51.9961 g\/mol Oda ko\u015fullar\u0131nda (25\u00b0C 298 K): G\u00fcm\u00fc\u015f\u00fcms\u00fc metalik kat\u0131 Metal d-blok elementi Kadmiyum 1761 y\u0131l\u0131nda Johann Gottlob Lehmann\u2019\u0131n Ural da\u011flar\u0131nda rastlad\u0131\u011f\u0131 portakal-k\u0131rm\u0131z\u0131 renkli mineral ile oldu. Bu bile\u015fik krokoid olarak bilinen kur\u015fun kromatt\u0131r.(PbCrO4) 1770 y\u0131l\u0131nda Peter Simon Pallas bu bile\u015fi\u011fin boyac\u0131l\u0131kta pigment(renk veren madde) olarak kullan\u0131labilece\u011fini ke\u015ffetti. &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1407,1403],"tags":[2258,2261,4766,3552,4767,3040],"class_list":["post-1773","post","type-post","status-publish","format-standard","hentry","category-fen-ve-teknoloji-odevleri","category-odevler","tag-aluminyum","tag-element","tag-kadmiyum","tag-krom","tag-kromat","tag-metal"],"_links":{"self":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/1773","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/comments?post=1773"}],"version-history":[{"count":0,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/1773\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/media?parent=1773"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/categories?post=1773"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/tags?post=1773"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}