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Oleh: Dr. M. Masykuri , M.Si .

Conductometry. Oleh: Dr. M. Masykuri , M.Si. Program Studi P. Kimia FKIP UNS Jl. Ir. Sutami 36A Solo HP . 08121500634 Email : mmasykuri@yahoo.com. Definisi. Metode analisis kimia berdasarkan pada daya hantar listrik suatu larutan analat. Hukum ohm menyatakan:. I = current (ampere)

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Oleh: Dr. M. Masykuri , M.Si .

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  1. Conductometry Oleh: Dr. M. Masykuri, M.Si. Program Studi P. Kimia FKIP UNS Jl. Ir. Sutami 36A Solo HP. 08121500634 Email: mmasykuri@yahoo.com

  2. Definisi • Metode analisis kimia berdasarkan pada daya hantar listrik suatu larutan analat Hukum ohm menyatakan: I = current (ampere) E = electromotive force (volts) R = resistance (ohms) The resistance of a sample of homogeneous material, 1 = length (m) A = cross-section area (m2)  = characteristic property of the material termed the resistivity (dalam  m) (formerly called specific resistance)

  3. Definisi The molar conductivity (, lambda) of an electrolyte is defined as the conductivity due to one mole and is given by: C = concentration of the solution in mol L-1, V = the dilution in L (i.e. the number of litres containing one mole). K has the dimensions  -1 cm-1, the units of are  -1cm2mol-1, or in SI units,  -1 m2 mol-1.

  4. Definisi The Conductance (G) is defined as : Luas permukaan elektroda Daya hantar listrik (ohm-1) Jarak antar elektroda Tahanan listrik (ohm)

  5. Definisi Daya hantar ekivalen (o, equivalence conductance): daya hantar 1 gram ekivalen (grek) zat terlarut diantara kedua elektroda yang berjarak 1 cm. Berat ekivalen: berat molekul / jumlah muatan dan C = konsentrasi = berat ekivalen/cm3 Dengan jarak antar elektroda l = 1 cm

  6. Definisi Konstanta sel () didefinisikan: Sehingga berlaku:

  7. Definisi Data perhitungan:

  8. Perhitungan • Hitung daya hantar listrik larutan HCl 0,01M bila daya hantar ion untuk H+ = 350 dan Cl- = 76. Konstanta sel 0,2 cm-1. • Sebanyak 50 mL asam asetat 10-3M diencerkan dengan 100 mL air. Tentukan daya hantar listrik larutan tersebut bila daya hantar ion CH3COO- = 40,9 dan anggap konstanta sel = 1.

  9. Perhitungan 3. Hitung daya hantar campuran 10 mL HCl 0,01 M; 40 mL CH3COOH 0,01 M dan 100 mL air

  10. Aplikasi Dalam berbagai titrasi asam basa: 1. Strong acid with a strong base

  11. Aplikasi Dalam berbagai titrasi asam basa: • Asam kuat dg basa kuat (1-2) Asam kuat dg basa lemah(1-3)

  12. Aplikasi c. Asam lemah dengan basa kuat d. Asam lemah dengan basa lemah

  13. Aplikasi d. Campuran asam kuat – asam lemah dengan basa kuat

  14. Terimakasih

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