7 From the list of acid-base indicators below, select the one BEST indicator for a titration with an equivalence point at pH 4.0(BE CAREFUL-enter indicator name EXACTLY as it appears in table):IndicatorpKaAcid colorBase colorMethyl violetCresol redMalachite greenThymol bluePhloxineOrange IVBenzopurpurinMethyl yellowMethyl orangeBromophenol blueCongo redDinitrophenolAlpha-Naphthyl redBromocresol greenMethyl redEthyl redAzolitmin (litmus)YellowBlueYellowBlue-greenYellow0.801.0Red1.3Yellow1.7Red1.8ColorlessPink2.1RedYellowRedYellowYellow2.8Violet3.3Red3.7RedYellow4.0Blue-violet4.1BlueRed4.1ColorlessYellow4.3RedYellow4.7YellowBlue5.1RedYellowColorlessRedYellow5.4red5.8BlueBromocresol purpleBromothymol blueNitrophenolPhenol red6.3Violet7.0YellowBlue7.2ColorlessYellow7.9YellowRedThymol bluePhenolphthaleinAlizarin yellow Rblue8.99.4YellowColorlessYellowRed11.0red

The indicators are chemical compounds that show changes in color at a definite change in pH. Hence,…

From the list of acid-base indicators below, select the one BEST indicator for a titration with an equivalence point at pH 4.0 (BE CAREFUL-enter indicator name EXACTLY as it appears in table): pKa 0.80 Indicator Acid color Base color Yellow Methyl violet Blue Yellow Cresol red Malachite green Thymol blue Phloxine Orange IV Benzopurpurin Methyl yellow Methyl orange Bromophenol blue Congo red Dinitrophenol Alpha-Naphthyl red Bromocresol green Methyl red Ethyl red Azolitmin (litmus) Bromocresol purple Bromothymol blue Nitrophenol Phenol red 1.0 Red Blue-green Yellow 1.3 Yellow 1.7 Red 1.8 Colorless Pink 2.1 Red Yellow 2.8 Violet Red 3.3 Red Yellow 3.7 Red Yellow 4.0 Yellow Blue-violet 4.1 Blue Red 4.1 Colorless Yellow 4.3 Red Yellow 4.7 Yellow Blue 5.1 Red Yellow red Blue 5.4 Colorless 5.8 Red 6.3 Yellow Violet 7.0 Yellow Blue 7.2 Yellow Colorless Yellow Yellow Colorless Yellow 7.9 Red Thymol blue Phenolphthalein Alizarin yellow R 8.9 blue 9.4 Red 11.0 red

From the list of acid-base indicators below, select the one BEST indicator for a titration with an equivalence point at pH 4.0 (BE CAREFUL-enter indicator name EXACTLY as it appears in table): pKa 0.80 Indicator Acid color Base color Yellow Methyl violet Blue Yellow Cresol red Malachite green Thymol blue Phloxine Orange IV Benzopurpurin Methyl yellow Methyl orange Bromophenol blue Congo red Dinitrophenol Alpha-Naphthyl red Bromocresol green Methyl red Ethyl red Azolitmin (litmus) Bromocresol purple Bromothymol blue Nitrophenol Phenol red 1.0 Red Blue-green Yellow 1.3 Yellow 1.7 Red 1.8 Colorless Pink 2.1 Red Yellow 2.8 Violet Red 3.3 Red Yellow 3.7 Red Yellow 4.0 Yellow Blue-violet 4.1 Blue Red 4.1 Colorless Yellow 4.3 Red Yellow 4.7 Yellow Blue 5.1 Red Yellow red Blue 5.4 Colorless 5.8 Red 6.3 Yellow Violet 7.0 Yellow Blue 7.2 Yellow Colorless Yellow Yellow Colorless Yellow 7.9 Red Thymol blue Phenolphthalein Alizarin yellow R 8.9 blue 9.4 Red 11.0 red

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter25: Ph Measurements-buffers And Their Properties

Section: Chapter Questions

Problem 1ASA

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I have contacted Bartleby customer support and they said this question is valid to be asked! They have said if someone denys again, i can contact them back and they will know who has declined and have a talk with them! Dont cause any issues! Use acid-base titration to determine theconcentration of:– A weak acid: CH3COOH 0.100 M NaOH (standardized)•0.100 M HCl0.100 M CH3COOH Phenolphthalein is used for endpoint determination– Changes from colourless to pink as a solution becomes more basic• Only need 2-3 drops per titration• pH range: 8.3-10
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