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17 Nov 2019
Which one of the following is the most appropriate chemical indicator to use in the titration of 0.100 molar acetic acid(aq) by 0.100 molar NaOH(aq)? K_b for acetate ion is 5.6 times 10^-10. cresol red, for which pK_ind = 7.9, also Hlnd is yellow and Ind^- is res phenol red, for which pK_ind = 7.3, also Hlnd is yellow and Ind^- is red These indicators will all work equally well for the titration of a weak acid by a strong base. bromothymol blue, for which pK_ind = 6.8, also Hlnd is yellow and Ind^- is blue phenolphthalein, for which pK_ind = 9.1, also Hlnd is colorless and Ind^- is pink
Which one of the following is the most appropriate chemical indicator to use in the titration of 0.100 molar acetic acid(aq) by 0.100 molar NaOH(aq)? K_b for acetate ion is 5.6 times 10^-10. cresol red, for which pK_ind = 7.9, also Hlnd is yellow and Ind^- is res phenol red, for which pK_ind = 7.3, also Hlnd is yellow and Ind^- is red These indicators will all work equally well for the titration of a weak acid by a strong base. bromothymol blue, for which pK_ind = 6.8, also Hlnd is yellow and Ind^- is blue phenolphthalein, for which pK_ind = 9.1, also Hlnd is colorless and Ind^- is pink
Lelia LubowitzLv2
11 Sep 2019