Set it on the floor behind the lab bench out of view of the audience. Label one pitcher as base, and fill completely with base solution.40 mL) in a small plastic bottle and place these in back of each of the beakers. Place a premeasured amount of acid/alcohol mixture (ca.Set them on the light background in rainbow order (ROYGBV) from left to right. Label the beakers with their color, and place five drops of indicator solution of that color in the center of each beaker.Mix 1.00 g of NaOH with distilled water, dilute to 2.0 L, and transfer to a plastic pitcher.Dilute 10 mL of concentrated H2SO4 in 20 mL of glycerin, and transfer to a dropping bottle.Mix with an equal volume (1 L) of 95% ethanol. Dilute 2.8 mL of concentrated H2SO4 to 1 L with deionized water.Mix the amounts listed above with 30 mL 95 % ethanol and store in dropping bottles labeled with the color indicated.Īcid-alcohol solution (0.05 M H2SO4 mixed with an equal volume of 95% ethanol): VIOLET: 0.9 g phenolphthalein + 0.4 g thymolphthalein.GREEN: 0.6 g thymolphthalein + 6.0 g p-nitrophenol.ORANGE: 0.45 g phenolphthalein + 6.0 g p-nitrophenol.RED: 1.5 g phenolphthalein + 3.0 g p-nitrophenol. ![]()
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