Question 27 3 pts Which one of the following indicators would be appropriate to determine the...
Which one of the following indicators would be appropriate to determine the equivalence point in the titration of 0.25 M HClO with 0.25 M NaOH? thymol blue bromocresol purple bromocresol green thymolphthalein
15. Which mixture would be the best butter? a. 1 M HF; 0.01 MF d. 0.1 M HC2H3O2; 0.01 M C2H302 b. 2 M HCI; 0.5 M CI e. 0.003 M HCIO; 0.003 M CIO C. 0.8 M H2C2O4; 0.8 M NaHC204 Thymol Blue 16. Which indicator would be the best for a titration of an hypoiodous acid (HIO), Ka = 2x 10-11 TABLE 16.1 Ranges of Color Changes for Several Acid-Base Indicators a. Crystal violet pH 2 0 3...
250 mL of 0.200 M aqueous ethylamine (C2H5NH2(aq), Kb = 5.6 × 10–4) is titrated with 0.200 M HCl(aq). Which of the following indicators would be most appropriate for detecting the equivalence point of the above titration? The range of pH values for which each indicator undergoes a color change is given in parentheses. A. Crystal Violet (pH 0-1.8) B. 2,4-Dinitrophenol (pH 2.5-4.0) C. Eriochrome Black T (pH 5.0-6.5) D. m-Nitrophenol (pH 6.8-8.5) E. Alizarin yellow (pH 10.0-12.0)
Be sure to answer all parts. Use the figure below to find an indicator for these titrations: (a) 0.10 M CH3NH2(Kb = 4.4 x 10-4) with 0.10 M HCI (select) (b) 0.50 M HI with 0.10 M KOH ((select) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Crystal violet Thymol blue 2,4-Dinitrophenol Bromophenol blue Bromocresol green Methyl red Alizarin Bromothymol blue Phenol red Phenolphthalein Alizarin yellow R
Which of the following color indicators would be most appropriate for the titration of a weak base with a strong acid. A. Phenol red, pKa =8.0 B. Phenolphthalein, pKa =9.5 C. Bromophenol blue, pKa =4.3 D. Alzarin yellow, pKa = 11.2
19. Choose the most appropriate indicator for the titration of a weak base wit the expected equivalence point of the titration is at pH 6.0. a. methyl orange, pH range 3.2-4.4 b. methyl red, pH range 4.8-6.0 c. bromothymol blue, pH range 6.5-7.6 d. phenolphthalein, pH range 8.2-10.0 e. alizarin yellow R, pH range 10.1-12.0
4. Two 0.100 M solutions of the weak acids HA and HB are titrated using KOH at 25°C. The pH at equivalence of HA is 8.5, while the pH at equivalence of HB is 10.3. 1. Which of these two acids is weaker? ii. Which of the indicators below would be suitable in the titration of HA? Which would be suitable in the titration of HB? Indicator Alizarin yellow GR phenolphthalein methyl orange methyl red bromothymol blue pH range for...
QUESTION 1 6 points Save Answer The purpose of an indicator in an acid-base titration is to indicate the of the titration. Use Table 10.2 for the following question. If an acidic solution is titrated with a basic solution and methyl violet is used as an indicator, the solution color will change from to QUESTION 2 3 points Save Answer The molarity of a solution prepared by dissolving 17.0 g of hydrochloric acid (HCI (aq) in 133 mL of water...
Explain which of the following indicators would be appropriate for a strong acid-strong base titration? Indicator pH of color change Bromphenol blue 3.0 - 4.6 Bromothymol blue 6.0 - 7.6 Phenolphthalein 8.0 - 9.6
30 (1 Point) Which of the following indicators is yellow at a pH of 10.0? A. bromcresol green B. phenol red C. thymol blue D. methyl violet E. alizarin yellow СА B С D О Е