WebExpert Answer. 88% (42 ratings) Transcribed image text: Label the pH scale below, indicating the acidity of a solution in the given regions. Indicate the color of phenolphthalein within the pH ranges shown below. Why is phenolphthalein an appropriate indicator for a weak acid-strong base titration? WebFeb 4, 2024 · The pH range of the phenolphthalein indicator is from 08.20 to 10.00. The chemical is colorless over a wide range of acidic pH values, although it turns pink at pH 8.2 and bright magenta at pH 10.00 and higher. Along with methyl red, bromothymol blue, and thymol blue, it is also a component of the universal indicator.

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WebPhenolphthalein Empirical Formula (Hill Notation): C20H14O4 CAS Number: 77-09-8 Molecular Weight: 318.32 MDL number: MFCD00005913 EC Index Number: 201-004-7 Pricing and availability is not currently available. Properties grade ACS reagent Quality Level 200 Agency reag. Ph. Eur. vapor pressure <0.00001 Pa ( 50 °C) form solid loss WebEach pH indicator is defined by a useful pH range. For example Phenolphthalein changes from colorless at 8.2 to pink at 10. And Bromthymol Blue has a useful range from 6.0 … rwnd 3000 cwnd 3500

Why Does Phenolphthalein Change Color? Sciencing

WebPhenolphthalein: colorless: 8.3–10.0: fuchsia: Thymolphthalein: colorless: 9.3–10.5: blue: Alizarine Yellow R: yellow: 10.2–12.0: red: These indicators are normally used over a fairly short range of pH values (indicated in the table above). As a pH indicator, bromothymol blue, for example, would be useful between from about pH 6.0 to pH 7 ... WebApr 7, 2024 · In the atmosphere, concrete reacts with carbon dioxide and its pH is reduced to 8.5-9 pH. If phenolphthalein is applied to the cement undergoing carbonation, it remains colourless. Phenolphthalein turns pink when it's applied to normal cement. 3. Phenolphthalein has been used as a laxative before. 4. Medical Uses: Kastle–Meyer Test WebIn a basic solution, methyl orange turns yellow, while phenolphthalein turns pink. Titration to a pH of 8.3 determines phenolphthalein alkalinity, which means the total hydroxide and half of the carbonate present. Titration to a pH of 5.1, 4.8, 4.5, or 3.7, depending on the amount of carbon dioxide present, determines total alkalinity. is deion sanders still coaching