●●● ●●●● ●●●●● 4. Experimental procedures ●●●● ●●●●● ●●●● (3)Open the piston of the separatory funnel to let the water in it drip slowly into the wild-mouth bottle Then the pressure inside the bottle increase gradually and bubbles will pass through the end of the capillary tube. o Read out the highest level h1 from the inclined tube manometer when the first bubble pass through it. Repeat the same procedures three times and calculate the average value h24.Experimental procedures ⚫ (3)Open the piston of the separatory funnel to let the water in it drip slowly into the wild-mouth bottle.Then the pressure inside the bottle increase gradually and bubbles will pass through the end of the capillary tube. ⚫ Read out the highest level h1 from the inclined tube manometer when the first bubble pass through it.Repeat the same procedures three times and calculate the average value h2