Kimia Unsur

CHEMISTRY CHEMISTRY PRESENTATIONPRESENTATION

CHEMISTRY CHEMISTRY PRESENTATIONPRESENTATIONAlkaline Metal – Group 1Alkaline Metal – Group 1

Squad of XII IA 2Squad of XII IA 2

Agung Agung Ismanuworo / 01Ismanuworo / 01 Amarendra S Amarendra S

N / 03N / 03Clarissa Clarissa Finanda / 11Finanda / 11 Mayarani N I / Mayarani N I /

1919

ALKALINE METALALKALINE METAL

Hydrogen

Lithium

Natrium

Potassium

Characteristic of Alkaline Characteristic of Alkaline MetalMetal

Very reactive React well with water, oxygen, hydrogen, halogen,

and sulphur Soluble in water The reactivity of alkaline is get greater as the length

of its radius From above to below, radius and density get larger Meanwhile, the ionization energy and electro

negativity is lower Soft metal, ease to be cut.

ReactionReaction

1. React with H2O Strong Base2L(s) + 2H2O(l) 2LOH(aq) + H2(g)

ex:2Na(s) + 2H2O(l) 2NaOH (aq) + H2(g)

2K(s) + 2H2O(l) 2KOH(aq) + H2(g)

2. React with Hydrogen Hybrid 2L(s) + 2H2(g) 2LH(s)

ex:2Li(s) + 2H2(g) 2LiH(s)

2K(s) + 2H2(g) 2KH(s)

3. React with Oxygen oksida, peroksida or super peroksidaoksida: 4Li(s) + O2(g) 2Li2O(s)

peroksida: 2Na(s) + O2(g) Na2O2(s)

super peroksida: K(s) + O2(g) KO2(s)

4. React with Halogen Halide salt2L(s) + X2 2LX(s)

ex:2Na(s) + Cl 2NaCl(s)

HydrogenHydrogen

• Symbolized H• Atomic number 1• At the standard temperature and pressure is colorless• Non-metal• Electron valence 1• Diatomic• Flammable• The lightest element• The Most Available element

LithiumLithium◊ Symbolized Li◊ Atomic Number 3◊ Electron configuration (He) 2s1

◊ Radius of atom 1.52 Å◊ Melting point 181°C◊ Boiling point 1347°C◊ Electro negativity 1.0◊ Density 0.53 g/cm3

◊ Burning color red

NatriumNatrium

• Symbolized Na• Atomic Number 11• Electron configuration (Ne) 3s1

• Atomic radius 1.86 Å• Melting point 97.8°C• Boiling point 883°C• Density 0.97 g/cm3

• Electro negativity 0.9• Burning color yellow

PotassiumPotassium

• Symbolized K• Atomic Number 19• Electron configuration (Ar) 4s1

• Atomic radius 2.31 Å• Melting point 63.6°C• Boiling point 774°C• Density 0.86 g/cm3

• Electron negativity 0.8• Burning color purple

How to make?By electrolysis: by melting halide salt

liquidEx: Melted NaCl (with electrode C)

NaCl Na+ + Cl- x2 K(-) Na+ + e Na x2 A(+) 2Cl- Cl2 + 2e x1

2 NaCl 2 Na + Cl2

The uses1. Li: for battery2. Na:-NaCl : for salt

-NaHCO3 : baking soda

-Na2CO3 : to remove “air sadah”

-NaNO3 : fertilizer

-NaOH : detergent3. K: -KOH : soap

-K2CO3 : ashes soda, for glass maker

-KClO3 : mesiu powder / matches

-K2SO4 : glass maker

-KCl: fertilizer

Thank You !!!!!