7-Li,Na,K,Rb,Cs,Fr (1. skupina) Flashcards

1
Q

pridobivanje Li

A

Na2CO3 + 2LiAlSi2O6 → Li2CO3 + 2NaAlSi2O6

Li2CO3(s) + CO2(g) + H2O(l) → 2LiHCO3(aq)

2LiHCO3(aq) → Li2CO3(s) + CO2(g) + H2O(l)

Li2CO3(s) + 2 HCl(aq) → 2LiCl(aq) + CO2(aq) + H2O(l)

2LiCl(l) → 2Li(l) + Cl2(g)

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2
Q

ALK kovine + VODA

A

2 M + 2 H2O → 2 MOH + H2

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3
Q

ALK kovine + O2 iz zraka

A

4 Li + O2 → 2 Li2O (oksid) O(2-)

2 Na + O2 → Na2O2 (peroksid) O2(2-)

K/Rb/Cs + O2 → MO2 (superoksidi) O2(-)

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4
Q

ALK oksidi + voda

A

M2O + H2O → 2M(+) + 2 OH(-)

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5
Q

ALK peroksidi + voda

A

M2O2 + 2 H2O → 2 M(+) + 2 OH(-) + H2O2

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6
Q

ALK superoksidi + voda

A

2 MO2 + 2 H2O → 2 M(+) + 2 OH(-) + H2O2 + O2

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7
Q

samo LiOH pri segrevanju razpade

A

2 LiOH → Li2O + H2O

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8
Q

spojine ALK elementov, ki pri visoki T razpadejo (se ne talijo kot normalne) =izjeme

A

2 NaNO3 → 2 NaNO2 + O2

2 NaHCO3 → Na2CO3 + CO2 + H2O →(naprej pri 650°C)

Li2CO3 → Li2O + CO2

2 LiOH → Li2O + H2O

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