III. A Skupina Flashcards by Kamila Bednaříková

Q

Borax

A

Na2[B4O5(OH)4] × 8H2O

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Q

Sassolin

A

H3BO3

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Q

Kernit

A

Na2O x 2B2O3 x 4H2O

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Q

Boracit

A

6MgO x 8B2O3 × MgCl2

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Q

Spalování B na vzduchu

A

4B + 3O2 -(t)-> 2B2O3

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Q

Reakce B s X2 za vzniku halogenidů

A

3Cl2 + 2B -> 2BCl3

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Q

Výroba boru redukcí B2O3 hořčíkem

A

B2O3 + 3Mg -> 2B + 3MgO

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Q

Teplota tání BCl3

A

-107°C

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Q

Teplota tání NaCl

A

801°C

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Q

Diboran

A

B2H6

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Q

Zahřívání sassolinu

A

H3BO3 -(t)-> 2HBO2 + 2H2O

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Q

Vznik B2O3 (hoření boru)

A

4B + 3O2 -(t)-> 2B2O3

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Q

Bauxit

A

Al2O3 × nH20

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Q

Kryolit

A

Na3[AlF6]

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Q

Korund

A

Al2O3

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Q

Redukční vlastnosti Al (t= 3000°C)

A

3MnO2 + 4Al -> 2Al2O3 + 3Mn

Fe2O3 + 2Al -> Al2O3 + 2Fe

Q

Hoření hliníku

A

4Al + 3 O2 -> Al2O3 (∆H = - 318 kJ/mol)

Q

Al v kyselých roztocích

A

2Al + 6HCl -> 2AlCl3 + 3H3

Q

Al v roztocích hydroxidů

A

2Al + 2NaOH + 6H2O -> 2Na[Al(OH)4] + 3H2

Q

Použití Al (Dural)

A

Al+Mg + Cu

Q

Al2O3 - vznik

A

4Al + 302 -(t)-> 2Al2O3

* Cr2O3 + 2Al -> Al2O3 + 2Cr (alumitnoremie)

Q

Al(OH)3 - vlastnosti

A

NR ve vodě

* má amfoterní vlastnosti : reaguje s kyselinami (hlinité soli) , reaguje se zásadami (hydroxohlinitany)

Q

Reakce Al2(OH)3 s kyselinou

A

•Al2(OH)3 + 3HNO3 -> Al(NO3)3 + 3H20

Dusičnan hlinitý

Q

Reakce Al2(OH)3 se zásadou

A

•Al2(OH)3 + KOH -> K[Al(OH)4]

Tetrahydroxohlinitan draselný

KAl(SO4)2 × 12H2O

Dodekahydrat síranu draselno-hliniteho

Dodekahydrat síranu draselno-hliniteho

KAl(SO4)2 × 12H2O

Al2(SO4)3 × 18H2O

Oktodekahydrát síranu hlinitého

Oktodekahydrát síranu hlinitého

Al2(SO4)3 × 18H2O