Anorganik suatu kuliah singkat reaksi ki

33 

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Teks penuh

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By :

Dina Kartika Maharani, M.Sc

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Outline

Ionic bonding

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Syllabus

2 Memahami perbedaan jenis-jenis ikatan kimia dan memahami pembentukan senyawa kovalen, koordinasi, ionik.

Ikatan Kimia: Pendahuluan, Ikatan kovalen: Teori ikatan valensi,teori tolakan elektron kulit valensi, Teori orbital molekul, momen dipol. Ikatan koordinasi: Teori ikatan valensi, teori orbital molekul.

Ikatan ion: Sifat-sifat senyawa ionik, pembentukan senyawa ionik, radius rasio, energi kisi, kelarutan senyawa ionik, aturan Fajan, penyimpangan struktur ionik sederhana.

4 x 3 x 50 ‘ tatap muka

2 Memahami prinsip-prinsip dasar reaksi kimia, teori asam basa, kekuatan asam, proses pelarutan, reaksi dalam pelarut air dan non air.

Reaksi-reaksi kimia: Prinsip dasar reaksi kimia, teori– teori asam basa, kekuatan asam, proses pelarutan, reaksi dalam pelarut air dan non air.

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Ionic Bonds

One or more

electrons from 1

atom are removed and attached to another atom,

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The positive sodium

ion and the negative

chloride ion are

strongly attracted to

each other.

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Covalent

Ionic

Compounds

Compounds

Crystalline solidsHigh melting and

boiling points

Conduct

electricity when melted

Poor electrical

conductors

Many soluble in

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Ionic Crystal Formation

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Electrostatic Approach

Interaksi ion-ion menurut gaya

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Electrostatic Approach

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Coulomb Interaction in Ionic

Lattice

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Tetapan Madelung A

NaCl :

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Energi kisi total melibatkan gaya tarik

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Persamaan Born Lande

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Kapustinskii Equation

Untuk kristal yang belum diketahui

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25

Dissolution of sodium chloride in water.

Polar water molecules are

attracted to Na+ and Cl

-ions in the salt or crystal, weakening the attraction between the ions.

As the attraction

between the ions weakens, the ions move apart and become

surrounded by water dipoles.

The hydrated ions slowly

diffuse away from the crystal to become dissolved in

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Solubility of Ionic Compound

Ion size and charge : Hydration

energy

Electronic configurationCrystal structure of solid

HSAB

Covalent character in ionic bond :

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Fajans rules : Polarization

High charge and small cation

polarizing power kation besar

mempolarisasi anion dengan kuat

High charge and large anion

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Electronic configuration of cation

kation dgn konf : (n-1)dx ns0 gol

transisi lebih mudah mempolarisasi daripada kation dgn konf (n-1)s2

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Pengaruh polarisasi

Peningkatan kelarutan dalam pelarut

polar seperti air

AgF : sangat larut dalam air

AgCl : larut dalam air dengan bantuan

ammonia

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Penyimpangan Struktur Kristal

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Transition Metal Gems

Transition Metal Gems

Gemstone owe their color from trace

transition-metal ions

Gemstone owe their color from trace

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Gemstones

the colors of rubies and emeralds are

both due to the presence of Cr3+ ions –

the difference lies in the crystal hosting the ion

Figur

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Referensi

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