Consider this table of indicators and their properties. Indicator Low pH color Color change pH interval High pH color phenolphthalein colorless 8.3 – 10 pink (fuchsia, magenta) methyl orange red 3.1 - 4.4 yellow bromothymol blue yellow 6.0 – 7.6 blue bromocresol green yellow 3.8 - 5.4 blue phenol red yellow 6.8 – 8.4 red Which indicator in the table is best suited for confirming that a water sample is neither acidic nor basic? methyl orange bromothymol blue phenolphthalein bromocresol green

Consider this table of indicators and their properties. Indicator Low pH color Color change pH interval High pH color phenolphthalein colorless 8.3 – 10 pink (fuchsia, magenta) methyl orange red 3.1 - 4.4 yellow bromothymol blue yellow 6.0 – 7.6 blue bromocresol green yellow 3.8 - 5.4 blue phenol red yellow 6.8 – 8.4 red Which indicator in the table is best suited for confirming that a water sample is neither acidic nor basic? methyl orange bromothymol blue phenolphthalein bromocresol green

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter24: Introduction To Spectrochemical Methods

Section: Chapter Questions

Problem 24.1QAP

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Similar questions

A solution has a pH of 4.5. What would be the color of the solution if each of the following indicators were added? (See Fig. 14-8.) a. methyl orange b. alizarin c. bromcresol green d. phenolphthalein
Explain why an acid-base indicator changes color over a range of pH values rather than at a specific pH.
Methyl orange, HMO, is a common acid-base indicator. In solution it ionizes according to the equation: HMOaqH+aq+MO-aqredyellow If methyl orange is added to distilled water, the solution turns yellow. If 1 drop or two of 6 M HCl is added to the yellow solution, it turns red. If to that solution one adds a few drops of 6 M NaOH, the color reverts to yellow. a. Why does adding 6 M HCl to the yellow solution of methyl orange tend to cause the color to change to red? Note that in solution HCl exists as H+ and Cl- ions. b. Why does adding 6 M NaOH to the red solution tend to make it turn back to yellow? Note that in solution NaOH exists as Na+ and OH- ions. How does increasing OH- shift Reaction 3 in the discussion section? How would the resulting change in H+ affect the dissociation reaction of HMO?
13. Fill in the necessary data in the following table: Indicator Methyl Orange Bromothymol Blue Phenolphthalein Pink pH range 3.8 - 5.4 Color Change Yellow to Blue Colorless to Yellow
Giventhe following substances, identify the color with the indicator used (assuming that the solution is clear). Solution Indicator Color Reaction Substance Indicator Color reaction Vinegar Congo red Yellow Orange Juice Methyl yellow Milk Phenolphthalein purple Ariel liquid® Thymolphthalein Joy® dishwashing Bromothymol blue Shampoo Bromocresol blue Coffee Phenol red Safeguard® Methyl orange Milo drink® Methyl violet Lactacyd® Cresol red
Use the table of indicators below to choose the most appropriate indicator to use when titrating Fill in the blanks by selecting benzoic acid with sodium hydroxide as described in the previous problem -- one option from each menu. methyl orange thymol blue 5 points Thymol blue Bromophenol blue Methyl orange Bromocresol green Methyl red Bromthymol blue Litmus Phenolphthalein bromocresol green methyl red bromophenol blue Alizarin yellow R T 0 1 2 3 4 6 7 9 10 11 12 13 PH
Suppose a student wants to determine the color change interval of an unknown indicator. Her results are given in the table. Tube # pH Unknown indicator 4 6.39 red 7.11 red 6. 7.87 purple 7 8.81 purple 8 9.07 blue 9 10.10 blue What is the interval of the unknown indicator? The color change interval is between pH 7.11 and pH 7.87. The color change interval is between pH 7.11 and pH 9.07. The color change interval is between pH 9.07 and pH 10.10. The color change interval is between pH 6.39 and pH 10.10.
An unknown solution is blue with indigo carmine and blue with thymolphthalein. From that information, predict the approximate pH range of the unknown solution, then determine the colour of the following indicators in that solution. Indicator Colour alizarin yellow R yellow/red/orange phenolphthalein colourless/pink thymol blue yellow/red/orange/green/blue