Alcoholic Phenolphthalein Indicator Solution, 1%, 500mL Material_Neoprene sized for hands-on Ohm's-law measurement

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

Bundled with an activity guide

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

Removable uterine sections at each gestational stage reveal in utero positioning from embryo through term fetus

molarity calculations

Alcoholic Phenolphthalein Indicator Solution, 1%, 500mL Material_Neoprene sized for hands-on Ohm's-law measurementUsed 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.