Atomic Number Of Lithium

  
  1. Atomic Number Of Lithium Is
  2. What Is The Atomic Number Of Lithium

Lithium: isolation

Lithium is the third element in the periodic table, with three protons and the element symbol Li. It has an atomic mass of 6.941. Natural lithium is a mixture of two stable isotopes, lithium-6 and lithium-7. Lithium-7 accounts for over 92% of the natural abundance of the element. Lithium is an alkali metal. It's silver-white in pure form and is. Aug 14, 2019 Lithium Properties. Lithium has a melting point of 180.54 C, a boiling point of 1342 C, a specific gravity of 0.534 (20 C), and a valence of 1. It is the lightest of the metals, with a density approximately half that of water.

Atomic number of lithium (li)

Atomic Number Of Lithium Is

Isolation: lithium would not normally be made in the laboratory as it is so readily available commercially. All syntheses require an electrolytic step as it is so difficult to add an electron to the poorly electronegative lithium ion Li+.

What Is The Atomic Number Of Lithium

The ore spodumene, LiAl(SiO3)2, is the most important commercial ore containing lithium. The α form is first converted into the softer β form by heating to around 1100°C. This is mixed carefully with hot sulphuric acid and extracted into water to form lithium sulphate, Li2SO4, solution. The sulphate is washed with sodium carbonate, Na2CO3, to form a precipitate of the relatively insoluble lithium carbonate, Li2CO3.

Li2SO4 + Na2CO3 → Na2SO4 + Li2CO3 (solid)

Reaction of lithium carbonate with HCl then provides lithium chloride, LiCl.

Li2CO3 + 2HCl → 2LiCl + CO2 +H2O

Lithium chloride has a high melting point (> 600°C) meaning that it sould be expensive to melt it in order to carry out the electrolysis. However a mixture of LiCl (55%) and KCl (45%) melts at about 430°C and so much less energy and so expense is required for the electrolysis.

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cathode: Li+(l) + e- → Li (l)

anode: Cl-(l) → 1/2Cl2 (g) + e-