Calculate surface tension using drop volume method- counting drops. a) distilled water-50 drops- surface tension 64 b) 5
Posted: Wed May 04, 2022 3:29 pm
Calculate surface tension using drop volume method- counting
drops.
a) distilled water-50 drops- surface tension
64
b) 5% Methanol in water- 65 drops
c) Gum Arabic, acacia 0.5% in water- 60 drops
If the radius of the capillary tip is kept the same from one experiment to another (the same pipette is used), the interfacial tension will be directly proportional to the volume of one drop (y x v), since all other factors in the expression are constant. If a fixed volume (V), for example 2 mL is allowed to drop from the pipette then the volume of one drop can be calculated by counting the number of drops (n). v = v/n (equation 2) If we make the total volume (V) constant, then y x n will be constant and y x 1/n, i.e., the interfacial tension will be inversely proportional to the number of drops. If the same pipette is used for all determinations then the radius of the tip will remain constant and the number of drops can be used to determine surface tension. If the interfacial tension for one system is known, the interfacial tensions of other systems can be determined according to the following relationship: Y₁. n₁ = y₂ . N₂ = Y³ . Në, etc. (equation 3)
If the radius of the capillary tip is kept the same from one experiment to another (the same pipette is used), the interfacial tension will be directly proportional to the volume of one drop (y x v), since all other factors in the expression are constant. If a fixed volume (V), for example 2 mL is allowed to drop from the pipette then the volume of one drop can be calculated by counting the number of drops (n). v = v/n (equation 2) If we make the total volume (V) constant, then y x n will be constant and y x 1/n, i.e., the interfacial tension will be inversely proportional to the number of drops. If the same pipette is used for all determinations then the radius of the tip will remain constant and the number of drops can be used to determine surface tension. If the interfacial tension for one system is known, the interfacial tensions of other systems can be determined according to the following relationship: Y₁. n₁ = y₂ . N₂ = Y³ . Në, etc. (equation 3)
drops.
a) distilled water-50 drops- surface tension
64
b) 5% Methanol in water- 65 drops
c) Gum Arabic, acacia 0.5% in water- 60 drops
- Calculate Surface Tension Using Drop Volume Method Counting Drops A Distilled Water 50 Drops Surface Tension 64 B 5 1 (69.25 KiB) Viewed 59 times
If the radius of the capillary tip is kept the same from one experiment to another (the same pipette is used), the interfacial tension will be directly proportional to the volume of one drop (y x v), since all other factors in the expression are constant. If a fixed volume (V), for example 2 mL is allowed to drop from the pipette then the volume of one drop can be calculated by counting the number of drops (n). v = v/n (equation 2) If we make the total volume (V) constant, then y x n will be constant and y x 1/n, i.e., the interfacial tension will be inversely proportional to the number of drops. If the same pipette is used for all determinations then the radius of the tip will remain constant and the number of drops can be used to determine surface tension. If the interfacial tension for one system is known, the interfacial tensions of other systems can be determined according to the following relationship: Y₁. n₁ = y₂ . N₂ = Y³ . Në, etc. (equation 3)