. Practical physical chemistry . Basicity of between the equivalent conductivity of — and It has been found that the difference solutions 1024 of the sodium or potassium salt of an acid is approximatelyequal to 10 X B units, where B represents the basicity of theacid. To determine the basicity of an acid, therefore, it isonly necessary to determine the equivalent conductivity of itssodium salt in a dilution of 32 litres and 1024 litres respectively,and to divide the difference of the values so found by 10. Thenearest whole number then represents the basicity of the —Det
. Practical physical chemistry . Basicity of between the equivalent conductivity of — and It has been found that the difference solutions 1024 of the sodium or potassium salt of an acid is approximatelyequal to 10 X B units, where B represents the basicity of theacid. To determine the basicity of an acid, therefore, it isonly necessary to determine the equivalent conductivity of itssodium salt in a dilution of 32 litres and 1024 litres respectively,and to divide the difference of the values so found by 10. Thenearest whole number then represents the basicity of the —Determine the Basicity of Succinic Acid. CONDUCTIVITY OF ELECTROLYTES 197 For the purpose of this experiment, sodium hydroxide freefrom carbonate is required. This is best prepared as follows:Metallic sodium in roughly weighed amount, according to thequantity and strength of the solution required, is freed fromthe adhering paraffin or other liquid, and from the crust ofoxide, and placed in the funnel F (Fig. 64), made of nickel. Fig. 64. gauze. This funnel stands in a basin containing a quantity ofwater which has been made distinctly alkaline with ordinarycaustic soda (more especially if the water contain much car-bonic acid in solution), and over all is placed a bell-jar, theneck of which is closed by a cork carrying a soda-lime end of this tube, which passes into the bell-jar, should bebent so that any moisture which may condense shall not dropon the sodium. Under the apex of the funnel is placed abasin, D, of platinum, silver, or nickel; but this basin should notswim free on the surface of the water, but should be placed on 198 PRACTICAL PHYSICAL CHEMISTRY a glass tripod, porcelain stand, or block of wood (weighted).The metallic sodium is now in an atmosphere free from carbondioxide and saturated with water vapour. The water vapouracts slowly on the sodium, and a strong solution of sodiumhydroxide trickles down into the basin placed under thefunnel. The operation c
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