Electrical Conductivity of Electrolytes and Non – Electrolytes

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De La Salle University-Dasmarinas
Dasmarinas, Cavite Philippines

Abstract
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The electrical conductivity of electrolytes and non-electrolytes activity demonstrated the physical propertiesand the conductivity of some solution. Electrical conductivity apparatusare dipped into a liquid in a beaker. Whenthe liquid contains significant concentrations of ions, the ions more between the electrodes to complete the circuit(which includes a light bulb).Tapwater and distilled water are examples of non-electrolytes. A solution of a weakelectrolytes, acetic acid (CH3COOH), 5% sucrose solution; it contains low concentrations of ions and so the bulbglows dimly. A solution of a strong electrolyte, HCL, NaOH, NH4CL, NaC, conc.H2SO4; it contains a highconcentration of ions and so the bulb glows brightly.

Introduction Substances that dissolve in water are either nonelectrolytes or electrolytes. Non-electrolytes are substances that do not form ions and are electrically non-conducting in solution. A common example is table sugar (sucrose) which dissolves in water as shown in Equation 1. Electrolytes are substances, such as NaCl and HCl, which form ions and give electrically conducting solutions, as shown in Equations 2 and 3. Note that when NaCl(s) dissolves in H2O, the ions originally present in the solid become free to move independently through the solution. By contrast, there are no ions in HCl(g), and it is the reaction between the HCl molecules and water that results in formation of ions.

Materials and Method
A 100mL of beaker were filled up to aboput 2/3 full with the following solution:
Tap Water 95 % C2H5OH 1M CH3COOH
Distilled water Sodium chloride crystals Sucrose crystals
12M HCL 1M NaCl 5% sucrose solution
1M HCL Conc. H2SO4 1M NH4OH
1M NaOH 1M H2So4 1M CH3COOH
1M NH4Cl 17M CH3COOH 1M NH¬4OH + CH3COOH
The electrodes of



References: Balasta, M.L.F.et al. Laboratory Manual and Workbook for General Chemistry. Part Two. Manila: Integrated Research Center, DLSU, 1983 Zayas, Clovia Isabel S. and Ramonesa R. Ricardo. Laboratory Manual for General Chemistry. Manila: DLSU Press,1994

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