BERYLLIUM Be

Light gray, floaty, fairly hard, brittle metal. On the air is covered by an oxide film. Passivated in cold water, concentrated sulfuric and nitric acids. Reducing agent. Reacts with boiling water, dilute acids, concentrated alkalis, non-metals, ammonia, metal oxides.

 

Obtaining metallic beryllium Be:

BeO + Mg = MgO + Be (700–800°C).

BeF2 + Mg = Be + MgF2 (700–750°C).

BeF2(liquid) → (Electrolysis) Be↓(cathode) + F2↑(anode).

BeCl2(liquid) → (Electrolysis) Be↓(cathode) + Cl2↑(anode).

 

Сhemical reactions with metallic beryllium Be:

2 Be + 3 H2O = BeO↓ +Be(OH)2↓ + 2 H2↑ (boiling).

Be + 2 HCl(diluted) = BeCl2 + H2↑.

3 Be + 8 HNO3(diluted, hot) = 3 Be(NO3)2 + 2 NO↑ + 4 H2O.

Be + 2 NaOH(conc.) + 2 H2O = Na2[Be(OH)4] + H2↑.

Be + 2 NaOH = Na2BeO2 + H2 (400–500°C).

2 Be + O2 = 2BeO (900°C, combustion on air).

Be + E2 = BeE2 (normal temp., E = F; 250°C, E = Cl; 480°C, E = Br, I).

Be + S = BeS (1150°C).

3 Be + N2 = Be3N2 (700–900°C),

2 Be + C(graphite) = Be2C (1700-1900°C, vacuum).

Be + 4 HF(conc.) = H2[BeF4] +H2↑.

3 Be + 2 NH3 = Be3N2 + 3 H2 (500–700° C).

Be + C2H2 = BeC2 + H2 (400–450°C).

Be + MgO = BeO + Mg (1075°C).

 

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