Potassium chromate. Ba lokisetsa ho ea thepa lik'hemik'hale 'meleng. kopo

potassium chromate kapa hromovoloknisty potassium (lebitso la machaba: Kalium chromicum, Kaliumchromat, potassium chromate) - ke komponeng inorganic, kristale bosehla ea tsamaiso orthorhombic, qhibilihang ka har'a metsi. Le bua ka letsoai la acid e chromic H2CrO4, eo ka eona boemo lokolohile ha a eo. Ka ntho chromate potassium moralo o latelang: CrK2O4

Mokhoa oa ho fumana chromate potassium?

Hromovoloknisty potassium fumana ka litsela tse ngata:

1. By chromium chlorate oxide e ho kena moea potassium (ba itšoara joang ho etsahala ka mocheso oa likhato 500-700):

Cr2O3 (chromium oxide e) + KClO3 (potassium chlorate) + K2CO3 (potassium carbonate) = 2K2CrO4 (potassium chromate) + KCl (potassium chloride) + 2CO2 (k'habone acid e khase)

2. By dissolving le oxide e chromium ka hydroxide potassium :

CrO3 (chromium oxide e) + 2KOH (hydroxide potassium) = K2CrO4 (potassium chromate) + H2O (metsi)

3. By li bole kapele 'ea dichromate potassium ka futhumatsang (karabelong e phethahatsoa ka mocheso oa likhato 500-600):

4K2Cr2O7 (potassium dichromate) = 4K2CrO4 (potassium chromate) + 2Cr2O3 (chromium oxide e) + 3O2 (oksijene)

4. Ka ho pepesehela tharollo khobokellane tsa hydroxide potassium ho dichromate potassium :

K2Cr2O7 (potassium dichromate) + 2KOH (potassium hydroxide) = 2K2CrO4 (potassium chromate) + H2O (metsi)

5. The mofuta matsoai le seoelo hore e bitsoa "tarapakait". Ho hromovoloknisty motsoako potassium.

Potassium chromate lik'hemik'hale thepa:

1. Ka hlapolla acid hromovoloknisty potassium kena dichromate potassium, eo moralo K2Cr2O7. Mohlala ke ba itšoara joang e latelang:

2K2CrO4 (potassium chromate) + 2HCl (acid e hydrochloric hlapolotsoeng) = K2Cr2O7 (potassium dichromate) + 2KCl (chloride potassium) + H2O (metsi)

2. Ka kopanelo le acid matla na ba ikutloa ka tsela e fapaneng ho etsahala, ho etsa mohlala:

K2CrO4 (potassium chromate) + 2HCl (acid e hydrochloric foromo khobokellane) K = (Kr (CL) O3) (complexed chromium) + KCl (chloride potassium) + H2O (metsi)

3. Ho ba itšoara joang le potassium chromate chesang acid concentrated bonahatse oxidizing thepa. mohlala e ba itšoara joang latelang o etsoang tsoa ka mocheso oa likhato tse 90:

2K2CrO4 (potassium chromate) + 16HCl (acid e hydrochloric) = 2CrCl3 (chromium chloride) + 3Cl2 (jwalo ka khase chloride) + 4KCl (chloride potassium) + 8H2O (metsi)

4. Hromovoloknisty potassium ka 'na la kena liphetoho phapanyetsano. Mohlala:

K2CrO4 (potassium chromate) + 2AgNO3 (silevera nitrate) = Ag2CrO4 (silevera chromate, precipitates) + 2KNO3 (potassium nitrate)
K2CrO4 (potassium chromate) + Hg2 (NO3) 2 (mercury nitrate) = Hg2CrO4 (mercury chromate precipitates) + 2KNO3 (potassium nitrate)

The thepa 'meleng oa chromate potassium:

1. The segokanyipalo sa e 2,732 g, / cm3.
2. potassium chromate qhibiliha ka 968,3 ° C. Ka mocheso oa likhato tse 668 kena khubelu hexagonal mohato - fumanang 'mala o mong - e khubelu. Leha ho le joalo, holim tsidifatso ea e-ba bosehla hape.
3. Mefuta kristale bosehla rhombic tsamaiso.
4. Ho ke ea sebaka sehlopha P-Nam.
5. bolela paramagnetic ena.
6. Mafutsana qhibilihang ka har'a ka ethanol, insoluble ka metsing. Qhibilihang ka har'a ka ethyl joala le diethyl.
7. boima molare ke 194,19 g, / Mol.

Optical thepa ea chromate potassium:

The refractive index of 1,74

Moo ho hlokehang potassium chromate?

1. indasteri The letlalo e sebelisoa e le moemeli tanning. Ka ho daea tsa masela a sebelisoa e le mordant.
2. E sebelisoa e le motsoako oa electrolyte ka bophara e khethehileng lik'hemik'hale degreasing.
3. Joalokaha ho brightener tsa boka ba linotši le oli.
4. tswakana manyolo ka oxidant e, ka mohlala, ka ho hlahisa dae.
5. Hape hromovoloknisty tharollo potassium sebediswa bakeng sa ba lokisetsa ho ea motlakase ya ho kena moea tsa silevera, 'me bakeng sa ho feta ha lihlahisoa ho tloha koporo le silevera lits'epe tse kopantsoeng.
6. sebelisoa e le pheko e homeopathy ka moriana.
7. dilaboratiriamong hlatswetsa dijana ke motsoako oa meqolo e lekanang ea acid e khobokellane sulfuric le K2Cr2O7 tharollo, pele e neng e ba phelelang ho ka a batang.

Potassium dichromate (lebitso botekgeniki - Chrompick)

Ho emela kristale ea 'mala o mofubelu-lamunu. Ha ho liforomo bonaletsang, o na segokanyipalo sa ea 2,684 a mob mobile ka disentimitara dikhubu, qhibiliha likhato 397. Ka futhumatsang ka ho eketsehileng bola. Solubility ka metsi likhato 20 o lekana le dikgerama 12,48 ea letsoai ka ho ya ka dikgerama 100 tsa metsi. Potassium dichromate ho pharaletseng sebelisoa e le oxidant ka pyrotechnics e, indasteri ea papali, 'me joalokaha e le reagent ka hromametrii.