Which of the following would tell you that a weak base is present? A. An indicator...
Which of the following would tell you that a weak base is present?
- A. An indicator added to the solution turns green-blue.
- B. If there is a high reaction rate.
- C. If the pH of the solution is close to 14.
- D. If the solution is a good conductor of electricity.
Homework Answers
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Which of the following would tell you that a weak base is
present?
A. An indicator...
Please explain throughly The indicator congo red is at pH = 1 and red at pH...
Please explain throughly
The indicator congo red is at pH = 1 and red at pH = 14 and has pK_a = 4.1. Based on this blue information a. it would be a good choice for a strong acid strong base titration b. it is blue at pH = 4 c. its end point occurs at pH = 9.9 d. it is red at pH = 3 e. it would be a good choice for a strong acid weak base...
The following graph shows the pH curve for the titration of 25 mL of a 0.1...
The following graph shows the pH curve for the titration of 25
mL of a 0.1 M monoprotic acid solution with a 0.1 M solution of a
monoprotic base.
mL of 0.1 M base added
(1) The pH curve represents the titration of a
_______(weak/strong) acid with a _______(weak/strong)base.
(2) Choose a suitable indicator for the endpoint
of the titration from the following pulldown list
__________.(bromocresol green / methyl red / bromothymol blue /
cresol red / thymol blue /...
Explain which of the following indicators would be appropriate for a strong acid-strong base titration? Indicator...
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
19. Choose the most appropriate indicator for the titration of a weak base wit the expected...
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
Which of the following acids, whose pKa values are given next to them, would have the...
Which of the following acids, whose pKa values are given next to them, would have the strongest conjugate base? pKa a) H2SO4 b) CH3COOH 4.8 c) HS 12.9 d) NH* 2.0 9.2 Reaction of a carboxylic acid with an alcohol produces: a) an alkane b) an ester c) a ketone d) an amide During the neutralisation of a weak acid by a strong base the pH of the solution equals the pKa of the acid: a) at the beginning of...
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...
Universal indicator is a solution which contains several acid base indicators and provided sufficient color changes to estimate pH over a wide range. One such indicator contains a mixture of thymol bl...
Universal indicator is a solution which contains several acid base indicators and provided sufficient color changes to estimate pH over a wide range. One such indicator contains a mixture of thymol blue, phenolphthalein, and methl orange. Determine the color of this indicator at a) pH=1.5, b) pH=4, c) pH 6.5, d) pH=9, and e) pH=11.5. Explain reasoning.
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to introduce you to several jdeas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be allowed to begin the experiment. Potassium acid phthalate, KHP (KHC4H&O4), is a primary standard reagent used to determine exactly the concentration of a solution of base, such...
Which of the following is true for the titration of a weak acid with a strong base? O a. The pH at the equivalence...
Which of the following is true for the titration of a weak acid with a strong base? O a. The pH at the equivalence point is acidic. b. A buffer solution is formed before the equivalence point. OC. The initial pH equals -log (conc. of the acid). Od. The indicator changes its color at the half-neutralization point.
QUESTION 13 Which of the following is false? a. The conjugate base of a relatively weak...
QUESTION 13 Which of the following is false? a. The conjugate base of a relatively weak acid is relatively strong b. Buffer solutions resist changes in pH c. at 25 pH + pOH = 14 d. To make an effective buffer, the pka of the weak acid should be as far away as possible from the pH that you wish to maintain. e. When titrating a weak monoprotic acid with NaOH, at the Veq pt/2, the equation pH pka is...
Please explain throughly
The indicator congo red is at pH = 1 and red at pH = 14 and has pK_a = 4.1. Based on this blue information a. it would be a good choice for a strong acid strong base titration b. it is blue at pH = 4 c. its end point occurs at pH = 9.9 d. it is red at pH = 3 e. it would be a good choice for a strong acid weak base...
The following graph shows the pH curve for the titration of 25
mL of a 0.1 M monoprotic acid solution with a 0.1 M solution of a
monoprotic base.
mL of 0.1 M base added
(1) The pH curve represents the titration of a
_______(weak/strong) acid with a _______(weak/strong)base.
(2) Choose a suitable indicator for the endpoint
of the titration from the following pulldown list
__________.(bromocresol green / methyl red / bromothymol blue /
cresol red / thymol blue /...
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
Which of the following acids, whose pKa values are given next to them, would have the strongest conjugate base? pKa a) H2SO4 b) CH3COOH 4.8 c) HS 12.9 d) NH* 2.0 9.2 Reaction of a carboxylic acid with an alcohol produces: a) an alkane b) an ester c) a ketone d) an amide During the neutralisation of a weak acid by a strong base the pH of the solution equals the pKa of the acid: a) at the beginning of...
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...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to introduce you to several jdeas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be allowed to begin the experiment. Potassium acid phthalate, KHP (KHC4H&O4), is a primary standard reagent used to determine exactly the concentration of a solution of base, such...
Which of the following is true for the titration of a weak acid with a strong base? O a. The pH at the equivalence point is acidic. b. A buffer solution is formed before the equivalence point. OC. The initial pH equals -log (conc. of the acid). Od. The indicator changes its color at the half-neutralization point.
QUESTION 13 Which of the following is false? a. The conjugate base of a relatively weak acid is relatively strong b. Buffer solutions resist changes in pH c. at 25 pH + pOH = 14 d. To make an effective buffer, the pka of the weak acid should be as far away as possible from the pH that you wish to maintain. e. When titrating a weak monoprotic acid with NaOH, at the Veq pt/2, the equation pH pka is...
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