Chrom Flashcards

0
Q

FeO • Cr2O3

A

Chromit

Redukce uhlíkem

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1
Q

Chrom

A
Cr
Tvrdý, odolný, stříbrno-lesklý
Odolný proti korozi
Nízká reaktivita s kyselinami (jen HCl, H2SO4/ ne v HNO3)
Cr3-, Cr6- nekdy Cr2+, Cr4+
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2
Q

FeCr2O4 + 4 C
2 Na2CrO4 + H2SO4
Na2Cr2O7 + 2 C
Cr2O3 + 2 Al

A

Fe + 2 Cr + 4 CO (ferochrom - slitina)
Na2Cr2O7 + Na2SO4 + H2O
Cr2O3 + Na2CO3 + CO
Al2O3 + 2 Cr

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3
Q

PbCrO4

A

Krokoit

Chromová žluť

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4
Q

BaCrO4

A

Žlutý ultramarín

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5
Q

Cr2O3

A

Chromový okr

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6
Q

Sloučeniny Cr3-

A

Prospěšný organismu

Cr2O3 (chromová zeleň, pigment)

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7
Q
(NH4)2Cr2O7
2 Cr(OH)3
A

Cr2O3 + N2 + 4 H2O

Cr2O3 + 3 H2O

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8
Q

KCr(SO4)2 • 12 H2O

A

Kamenec chromitý

Barvy zpracování kůží

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9
Q

Slouceniny Cr6+

A

Muzou bejt karcinogenní
Rovnováha ovlivněna pH
Drive součást trubicek na detekci alkoholu

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10
Q

CrO4 2-

A

Chromany
Žluté
Rovnováha ovlivněna pH prostředím

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11
Q

Cr2O7 2-

A

Dichromany

Silná oxidační činidla

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12
Q

2 CrO4 + 2 H
Cr2O7 2- + 2 OH-
Cr2O7 + 6 Fe + 14 H
Cr2O7 + 14 H + 6 I-

A

Cr2O7 + H2O
CrO4 2- + H2O
2 Cr + 6 Fe + 7 H2O
3 I2 + 2 Cr + 7 H2O

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13
Q

CrO2

A

Feromagnetický vlastnosti

záznamový materiál

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