Dab tsi yog Pawg 2 cations?
Dab tsi yog Pawg 2 cations?

Video: Dab tsi yog Pawg 2 cations?

Video: Dab tsi yog Pawg 2 cations?
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Pab pawg 2 muaj cov cations uas precipitate li sulfide nyob ib ncig ntawm pH 0- 2 . Lub precipitating reagent yog sodium sulphide Na 2 S. Cov tshuaj yog acidic vim hydrochloric acid; nws sib raug rau lub supernatant los ntawm kev tsom xam ntawm pab pawg 1 cations.

Raws li, Pawg 3 cations yog dab tsi?

Pawg 3 cations tseem hu ua hydroxides pab pawg , vim nws yog ua los ntawm cations uas precipitate li hydroxides hauv ammonia alkaline tov. Tshwj xeeb tshaj yog lawv precipitate nyob ib ncig ntawm pH 9, pH ua nrog ammonia thiab ammonium chloride (NH) 3 / NH4Cl), ib qho kev daws teeb meem ntau heev.

Kuj Paub, Dab tsi yog Pawg 4 cations? Pawg IV cations yog calcium (II) Ca2+, strontium (II) Sr2+ thiab barium (II) Ba2+. Nws pab pawg reagent yog 1M daws ntawm ammonium carbonate (NH 4 )2CO3 nyob rau hauv nruab nrab los yog alkaline nruab nrab. Qhov nruab nrab yuav tsum yog nruab nrab lossis alkaline vim tias nws yooj yim decomposed txawm tias tsis muaj zog acids xws li acetic acid.

yog Group 2 cation los yog anion?

Pab pawg 2 Cov anions ntawm no pab pawg Tsis txhob hnov qab nrog hydrochloric acid, tab sis tsim precipitates nrog barium ions nyob rau hauv nruab nrab nruab nrab. Ions ntawm no pab pawg yog sulfate, phosphate, fluoride, thiab borate. Pab pawg 3 Anions ntawm no pab pawg Tsis txhob hnov qab nrog dilute hydrochloric acid, lossis nrog barium ions hauv nruab nrab nruab nrab.

Vim li cas cov cations muab faib ua pawg?

Cations yog muab faib ua rau pab pawg . Txhua pab pawg muaj ib qho reagent uas tuaj yeem siv los cais lawv ntawm cov tshuaj. Vim tias cationic tsom xam raws li cov khoom solubility ntawm cov ions, cov txiaj ntsig muaj txiaj ntsig tuaj yeem tau txais tsuas yog tias kev sib cais ua tiav hauv ib ntus.

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