Chemistry

Chemistry, 30.07.2019 21:00, atiyawhite7863

When does phenolphthalein turn pink?

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Chemistry, 14.07.2019 16:30, wezner19

Apiece of lithium metal is added to a beaker that contains water and phenolphthalein. using what you know about the properties of bases, choose the best explanation for what you observe. 1) the phenolphthalein is turning pink because an acid is forming 2) the phenolphthalein is turning pink because a base is forming. 3) the phenolphthalein is turning pink because the reaction is at equilibrium.

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Chemistry, 22.08.2019 19:50, gungamer720

An unknown substance turns blue litmus paper to red. which additional test could be used to confirm the substance’s identity? it should turn phenolphthalein from colorless to pink because it is a base. it should turn phenolphthalein from pink to colorless because it is a base. it should turn methyl orange to orange because it is an acid. it should turn methyl orange to red because it is an acid.

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Chemistry, 25.09.2019 01:00, genyjoannerubiera

In part iii, the phenolphthalein indicator is used to monitor the equilibrium shifts of the ammonia/ammonium ion system. the phenolphthalein equilibrium established with water is hph(aq)(colorless) + h2o (l) h3o+ (aq) + ph-(aq)(pink or red). you compared the color of the solutions in three test tubes that initially contained 3 ml of 0.1 m ammonium hydroxide and a few drops of phenolphthalein indicator. in the first test tube, you added 1 m nh4cl dropwise. what color change was observed and what did this color change indicate about the shift in the phenolphthalein equilibrium? a. the solution turned a more intense pink or red color indicating that the phenolphthalein equilibrium shifted to the left, producing more of the pink or red colored hph.

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