Cov txheej txheem:

Hom tshuaj tiv thaiv dab tsi yog alum synthesis?
Hom tshuaj tiv thaiv dab tsi yog alum synthesis?

Video: Hom tshuaj tiv thaiv dab tsi yog alum synthesis?

Video: Hom tshuaj tiv thaiv dab tsi yog alum synthesis?
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Anonim

Al (OH) 3 muab cov tuab, dawb, gelatinous precipitate ntawm aluminium hydroxide. Raws li ntau sulfuric acid ntxiv, lub precipitate ntawm Al (OH) 3 dissolves rau daim ntawv soluble Al3+ ions. Thaum kawg, cov crystals ntawm alum raug tshem tawm ntawm cov tshuaj los ntawm lub tshuab nqus tsev pom thiab ntxuav nrog cawv / dej sib tov.

Tom qab ntawd, ib tug kuj yuav nug, koj yuav ua li cas ua ke alum?

Ua kom tiav qhov tsim ntawm alum:

  1. Maj mam thiab ua tib zoo do 22.5 mL ntawm 4 M H2YOG4(aq) rau hauv cov lim hauv kwv yees li 5-mL feem. Saib xyuas thiab sau cov kev hloov pauv hauv cov lim dej.
  2. Siv lub phaj kub, kub lub acidified filtrate kom txog thaum tag nrho cov khoom dissolves.
  3. Cov kauj ruam cuam tshuam nrog sulfuric acid:

Tom qab, lo lus nug yog, hom tshuaj tiv thaiv dab tsi yog Al Koh h2o? Cov tshuaj tiv thaiv ntawm Al(s) hauv aqueous KOH yog ib qho piv txwv ntawm oxidation-txo lossis redox cov tshuaj tiv thaiv. Al hlau yog oxidized rau txhuas ion nrog tus lej oxidation ntawm +3 thiab hydrogen hauv KOH lossis hauv dej yog txo los ntawm tus lej oxidation ntawm +1 rau xoom hauv hydrogen gas.

Hauv qhov no, lub hom phiaj ntawm kev sib txuas ntawm alum lab yog dab tsi?

Lub hom phiaj ntawm qhov kev sim yog los tsim cov txhuas alum los ntawm txhuas hlau, potassium hydroxide thiab sulfuric acid . Lub synthesis yuav ua tiav nyob rau hauv ob theem ua ke raws li qhia nyob rau hauv cov tshuaj tiv thaiv (9-1) thiab (9-2). Tag nrho cov tshuaj tiv thaiv rau cov synthesis yog muab nyob rau hauv cov tshuaj tiv thaiv (9-3).

Yuav ua li cas muaj pes tsawg moles ntawm alum yuav ua tau theoretically?

Los ntawm moles , koj ua tau nrhiav grams los ntawm kev siv cov molar loj ntawm cov alum . Thaum kawg, rau % tawm los, nws yuav yuav tawm los tiag (12.77g) muab faib los ntawm cov theoretical yield (x 100%).

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