Producing Chlorine (Cl)

Cl: Chlorine

Scheel (Sweden) discovered in 1774.

Abundance: 126ppm(in the earth's crust), 19.00g/litter(in the sea water)

Method 1

React hydrochloric acid to manganese dioxide.

4H(+) + 2Cl(-) + MnO2 Mn(2+) + 2H2O + Cl2

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Method 2

Heat calcite.

CaCO3 CaO + CO2

Mix produced quick lime with sand and water.

CaO + H2O Ca(OH)2

Add calcium hydroxide into sea water to lower pH.

Ca(OH)2 + MgCl2(in sea water) CaCl2 + Mg(OH)2

Separate milky white deposit, and solve in hydrochloric acid.

Mg(OH)2 + 2HCl MgCl2 + 2H2O

Dry, melt over 714 Cersius, and apply electrodialysis.

MgCl2 Mg + Cl2