Phenolphthalein has a pKapKa of 9.7 and is colorless in its acid form and pink in...
Phenolphthalein has a pKapKa of 9.7 and is colorless in its acid form and pink in its basic form.
a) For pH=pH= 2.0 calculate [In−]/[HIn][In−]/[HIn].
Express your answer using two significant figures.
b)
Predict the color of a phenolphthalein solution.
Predict the color of a phenolphthalein solution.
| colorless |
| pink |
c) For pH=pH= 5.1 calculate [In−]/[HIn][In−]/[HIn].
Express your answer using two significant figures.
d) Predict the color of a phenolphthalein solution.
Predict the color of a phenolphthalein solution.
| colorless |
| pink |
e) For pH=pH= 8.3 calculate [In−]/[HIn][In−]/[HIn].
Express your answer using two significant figures.
f) Predict the color of a phenolphthalein solution.
Predict the color of a phenolphthalein solution.
| colorless |
|
pink |
g) For pH=pH= 11.3 calculate [In−]/[HIn][In−]/[HIn].
Express your answer using two significant figures.
h) Predict the color of a phenolphthalein solution.
Predict the color of a phenolphthalein solution.
| colorless |
| pink |
Homework Answers
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Phenolphthalein has a pKapKa of 9.7 and is colorless in its acid
form and pink in...
24 Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH less tha...
Show all work and steps please
24 Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH less than 8 3) and pink in the base form (pH greater than 100) It is a weak acid with a pka of 8.7. What fraction is in the acid form when the ocid color is apparent? What fraction is in the base form when the base color is apparent?
24 Phenolphthalein is a commonly used indicator that is...
Phenolphthalein is an indicator that turns from colorless (acidic form) to magenta (basic form) and has...
Phenolphthalein is an indicator that turns from colorless (acidic form) to magenta (basic form) and has a pKa of 9.40. What is the ratio of the magenta phenolphthalein concentration to the colorless phenolphthalein concentration ([magenta phenolphthalein]/[colorless phenolphthalein]) at a pH of 10.9?
Chloropropionic acid, CICH2CH2COOH is a weak monoprotic acid with Ka = 7.94 x 10-5 M. Calculate...
Chloropropionic acid, CICH2CH2COOH is a weak monoprotic acid with Ka = 7.94 x 10-5 M. Calculate the pH at the equivalence point in a titration 48.7 mL of 0.39 M chloropropionic acid with 0.7 M KOH. Answer: Indicators of Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH < 8.3) and pink in the basic form (pH > 10.0). It is a weak acid with a pka of 8.7. What is the ratio of the...
QUESTION 1 6 points Save Answer The purpose of an indicator in an acid-base titration is...
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B. The following questions are from today's experiment: EQUL 307: pH, Acids, and Bases Use the...
B. The following questions are from today's experiment: EQUL 307: pH, Acids, and Bases Use the table to answer your questions: 0.1 M solution Methyl orange Methyl Violet Phenolphthalein Thymolphthalein pH range 3.1 to 4.4 0.5 to 2.0 8.0 to 9.B 9.3 to 10.5 Color change red to yellow yellow to violet colorless to red colorless to blue yellow light pink colorless NaNO, кон violet violet yellow red blue 1. Is a 0.1 M solution of KOH acidic or basic?...
Part A Calculate the H,O of the following polyprotic acid solution: 0.390 MH,PO, Express your answer...
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15. The acid-base indicator bromocresol green has a Ka of 6.3 x 10-5. Its protonated form...
15. The acid-base indicator bromocresol green has a Ka of 6.3 x 10-5. Its protonated form is yellow while its deprtonated form is blue. If bromocresol green is added to a colorless solution with a pH of 8, then what will the color be?
Methyl red has a pKa of 5.0 and is red in its acid form and yellow...
Methyl red has a pKa of 5.0 and is red in its acid form and yellow in its basic form. If several drops of this indicator are placed in a 25.0 −mL sample of HCl, what color will the solution appear? Yellow or red? This answer is RED I need part B answered: B) If 0.130 M NaOH is slowly added to the HCl sample, in what pH range will the indicator change color?
The following kinetic data are collected for the initial rates of a reaction 2X + Z...
The following kinetic data are collected for the initial rates of a reaction 2X + Z rightarrow products: What is the value of the rate constant with proper units? Express your answer to two significant figures and include the appropriate units. What is the reaction rate when the initial concentration of X is 0.68 M and that of Z is 1.38 M? Express your answer to two significant figures and include the appropriate units. Calculate the molar concentration of OH^-...
Calculate the [H3O+] of the following polyprotic acid solution: 0.310 MH3PO4 .
Calculate the [H3O+] of the following polyprotic acid solution: 0.310 MH3PO4 .Express your answer using two significant figures. Part B Calculate the pH of this solution. Express your answer using one decimal place.
Show all work and steps please
24 Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH less than 8 3) and pink in the base form (pH greater than 100) It is a weak acid with a pka of 8.7. What fraction is in the acid form when the ocid color is apparent? What fraction is in the base form when the base color is apparent?
24 Phenolphthalein is a commonly used indicator that is...
Chloropropionic acid, CICH2CH2COOH is a weak monoprotic acid with Ka = 7.94 x 10-5 M. Calculate the pH at the equivalence point in a titration 48.7 mL of 0.39 M chloropropionic acid with 0.7 M KOH. Answer: Indicators of Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH < 8.3) and pink in the basic form (pH > 10.0). It is a weak acid with a pka of 8.7. What is the ratio of the...
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...
B. The following questions are from today's experiment: EQUL 307: pH, Acids, and Bases Use the table to answer your questions: 0.1 M solution Methyl orange Methyl Violet Phenolphthalein Thymolphthalein pH range 3.1 to 4.4 0.5 to 2.0 8.0 to 9.B 9.3 to 10.5 Color change red to yellow yellow to violet colorless to red colorless to blue yellow light pink colorless NaNO, кон violet violet yellow red blue 1. Is a 0.1 M solution of KOH acidic or basic?...
Part A Calculate the H,O of the following polyprotic acid solution: 0.390 MH,PO, Express your answer using two significant figures. O ACCO ? [H,01 = Submit Request Answer Part B Calculate the pH of this solution Express your answer using one decimal place. Val AEO ? pH = Submit Request Answer Part Calculate the (H2O) and pH of the following polyprotic acid solution: 0.370 MH,CO Express your answer using two significant figures. VO AL OO ? (H,0) = Submit Request...
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The following kinetic data are collected for the initial rates of a reaction 2X + Z rightarrow products: What is the value of the rate constant with proper units? Express your answer to two significant figures and include the appropriate units. What is the reaction rate when the initial concentration of X is 0.68 M and that of Z is 1.38 M? Express your answer to two significant figures and include the appropriate units. Calculate the molar concentration of OH^-...
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