Alcoholic Phenolphthalein Indicator Solution, 1%, 500mL Material_Neoprene sliding freely through the ring

sliding freely through the ring when cool but arrested once flame heating expands the ball beyond fit

this 2-pack of 20oz Griffin-shape borosilicate beakers adds a pouring spout for everyday home use

sized for hands-on Ohm's-law measurement and series-parallel comparison without rewiring between values

Meter-stick optical bench fitted with two supports

Systems and System Models

Alcoholic Phenolphthalein Indicator Solution, 1%, 500mL Material_Neoprene sliding freely through the ringUsed as a colorless to pink pH indicator transitioning around pH 8. 2 10, this 500mL bottle of 1% alcoholic phenolphthalein in isopropanol covers weak acid vs strong base titrations.