Aim: to determine the interficial between two immisible liquids by drop weight method.
Apparatus Required: liquids, glass funnel, glass tube with pinch cock, beakers, screw gauge, stop clock etc____
Principal: In a step as shown. When a heiveir liquids is made to form drops sufficiently slowly is g where m.is the acceleration due to gravity. At the instant of detachment
An arrangement is made as shown. Using the stop clock, the pinch cock.screw is carefully adjusted such that 16 - 18 drops of water, are uniformly formed in air per minute
A clean beaker with certain amount of kerosene is taken and its mass m is determined using a physical balance
The tip of the tube is just immersed in the kerosene and a certain number of drops of water , say N drops, are collected in its this beakers the value of N is also noted down
Step 4 :: step 2 and 3 are repeated for 3 times and means mass of N drops is obtained. The mean of a single drop of the equation
Step 5:: The results of step 2-4 are tabulated shown in Table 1
Step 6:: The zero error and the least count of the given screw gauge is noted down
Step 7 : The external Diameters d of the tube is then measured for three times and the mean value of is calculated
Step 8: The results of step 8 and 9 are recorded as shown in table 2 . The density of two liquids are noted down from a standard physical tube and the liquids become completely immisible the two liquids is calculated
Report interficial surface tension between two liquids
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