9-Mn,Tc,Re (VII stranska skupina) Flashcards

1
Q

pridobivanje Mn

A

3 MnO2 + 4 Al → 3 Mn + 2 Al2O3

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2
Q

Feromangan dobimo z redukcijo Fe- in Mnoksidov z ogljikom

A

x MnO2(s) + y Fe2O3(s) + (2x + 3y) C(s) → FexMny + (2x + 3y) CO(g)

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3
Q

pridobivanje čistega Mn (elektroliza)

A

2 MnSO4(aq) + 2 H2O → 2 Mn(s) + 2 H2SO4(aq) + O2

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4
Q

Mn s kisikom

A

Mn + O2 → Mn2O3 (kis), Mn3O4 (amorf), MnO (baz)

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5
Q

Tc, Re s kisikom

A

Tc, Re + O2 → Tc2O7, Re2O7

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6
Q

MnO4(-) kitro razpade v kislem (v nevt in baz pa počasi)

A

4 MnO4(-) + 4 H(+) → 4 MnO2 + 3 O2 + 2 H2O

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7
Q

MnO4(-) oksidant v kislem

A

MnO4(-) + 5 e(-) + 8 H(+) → Mn(2+) + 4 H2O

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8
Q

MnO4(-) oksidant v nevtralnem

A

MnO4(-) + 3 e(-) + 2 H2O → MnO2 + 4 OH(-)

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9
Q

MnO4(-) oksidant v bazičnem

A

MnO4(-) + e(-) → MnO4(2-)

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10
Q

reakcije permanganata

A

MnO4(-) + 5 Fe(2+) + 8 H(+) → Mn(2+) + 5 Fe(3+) + 4 H2O
ali
2 MnO4(-) + I(-) + H2O → 2 MnO2 + IO3(-) + 2 OH(-)
ali
2 MnO4(-) + SO3(2-) + 2 OH(-) → 2 MnO4(2-) + SO4(2-) + H2O

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11
Q

Mn z oks št 6+

A

3 MnO4(2-) + 4 H(+) → 2 MnO4(-) + MnO4(-) + MnO2 + 2 H2O

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12
Q

Mn z oks št 4+

reakcije s kislinami

A

MnO2 + 4 HCl → MnCl2 + Cl2 + 2 H2O
in
4 MnO2 + 12 H2So4 → 4 Mn(HSO4)3 + O2 + 6 H2O

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13
Q

Mn z oks št 2+ pazi!!

A

2 MnO2 + 2 H2SO4 → 2 MnSO4 + O2 + 2 H2O

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