Homework Answers
Bromocresol Green is an indicator which has acidic protons in the form of -OH. When it will be added to a solution with pH 8, the acidic protons will be deprotonated as pH 8 is basic in nature. Therefore, the indicator will be present in its deprotonated form and hence show blue color.
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15. The acid-base indicator bromocresol green has a Ka of 6.3 x 10-5. Its protonated form...
A certain indicator, HA, has a Ka value of 2.0 x107. The protonated form of the...
A certain indicator, HA, has a Ka value of 2.0 x107. The protonated form of the indicator is blue and the ionized form is yellow What is the pKa of the indicator? Number What is the color of this indicator in a solution with pH 5? O blue O yellow O green
The acid form of the indicator bromocresol green has ka = 2.0 * 10-5. For which...
The acid form of the indicator bromocresol green has ka = 2.0 * 10-5. For which one of the following types of titrations would bromocresol green be the appropriate indicator? Multiple Choice O strong acid/weak base strong acid/strong base O weak acid/strong base O weak acid/weak base O O None of these choices are correct.
A certain indicator, HA, has a K value of 1.6 x 10^-7. The protonated form of...
A certain indicator, HA, has a K value of 1.6 x 10^-7. The protonated form of the indicator is blue and the ionized form is yellow. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 9?
Methyl orange is an indicator with a Ka of 1 x 10-4. Its acid form, HIn,...
Methyl orange is an indicator with a Ka of 1 x 10-4. Its acid form, HIn, is red, while its base form, In-, is yellow. At pH 7.0, the indicator will be___________. a. red. b. orange. c. yellow. d. blue. e. not enough information
Consider the titration of 25.00 mL of 0.115M NH3 (ka= 5.70e-10 ; kb= 1.75e-5) with 0.0920...
Consider the titration of 25.00 mL of 0.115M NH3 (ka= 5.70e-10 ;
kb= 1.75e-5) with 0.0920 M HCl.
a) calculate the pH of the solution for the following volume of
HCl: 6.25 mL
b) calculate the pH of the solution for the following volume of
HCl: 31.25 mL
c) calculate the pH of the solution for the following volume of
HCl: 50.0 mL
d) Which indicator from the table minimizes the titration error
and why?
blue Indicator thymol blue bromophenol...
A weak acid indicator HIn is blue while its conjugate base In is green. Kaln for...
A weak acid indicator HIn is blue while its conjugate base In is green. Kaln for the indicator is 7.7 x 10*5 Over what pH range does the indicator change color? lower pH upper pH
A weak acid indicator Hin is blue while its conjugate base in is green. Kain for...
A weak acid indicator Hin is blue while its conjugate base in is green. Kain for the indicator is 4.7 x 10-5 Over what pH range does the indicator change color? lower pH upper pH
A certain indicator, HA, has a K, value of 0.00040. The protonated form of the indicator...
A certain indicator, HA, has a K, value of 0.00040. The protonated form of the indicator is yellow and the ionized form is red. What is the pK, of the indicator? PK = What is the color of this indicator in a solution with pH = 5? O yellow orange red
QUESTION 1 6 points Save Answer The purpose of an indicator in an acid-base titration is...
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...
a) An unknown indicator (called “HIn”) has a Ka of 4.0 x 10-6. The color of...
a) An unknown indicator (called “HIn”) has a Ka of 4.0 x 10-6. The color of the neutral form is green, and that of ionized form is red. The indicator is added to a HCl solution, which is then titrated against a NaOH solution. At what pH will the indicator change color? b) 350. mL of a NaOH solution was added to 500. mL of 2.50 M HNO2. The pH of the mixed solution was 1.75 units greater than that...
A certain indicator, HA, has a Ka value of 2.0 x107. The protonated form of the indicator is blue and the ionized form is yellow What is the pKa of the indicator? Number What is the color of this indicator in a solution with pH 5? O blue O yellow O green
The acid form of the indicator bromocresol green has ka = 2.0 * 10-5. For which one of the following types of titrations would bromocresol green be the appropriate indicator? Multiple Choice O strong acid/weak base strong acid/strong base O weak acid/strong base O weak acid/weak base O O None of these choices are correct.
A certain indicator, HA, has a K value of 1.6 x 10^-7. The protonated form of the indicator is blue and the ionized form is yellow. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 9?
Consider the titration of 25.00 mL of 0.115M NH3 (ka= 5.70e-10 ;
kb= 1.75e-5) with 0.0920 M HCl.
a) calculate the pH of the solution for the following volume of
HCl: 6.25 mL
b) calculate the pH of the solution for the following volume of
HCl: 31.25 mL
c) calculate the pH of the solution for the following volume of
HCl: 50.0 mL
d) Which indicator from the table minimizes the titration error
and why?
blue Indicator thymol blue bromophenol...
A weak acid indicator HIn is blue while its conjugate base In is green. Kaln for the indicator is 7.7 x 10*5 Over what pH range does the indicator change color? lower pH upper pH
A weak acid indicator Hin is blue while its conjugate base in is green. Kain for the indicator is 4.7 x 10-5 Over what pH range does the indicator change color? lower pH upper pH
A certain indicator, HA, has a K, value of 0.00040. The protonated form of the indicator is yellow and the ionized form is red. What is the pK, of the indicator? PK = What is the color of this indicator in a solution with pH = 5? O yellow orange red
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...
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