Addition of phenolphthalein to an unknown colorless solution does not cause a color change. The addition...
Addition of phenolphthalein to an unknown colorless solution does not cause a color change. The addition of bromthymol blue to the same solution leads to a yellow color.
Is the solution acidic, neutral, or basic?
Which of the following can you establish about the solution:
What other indicator or indicators would you want to use to determine the pH of the solution more precisely?
Homework Answers
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Addition of phenolphthalein to an unknown colorless solution
does not cause a color change. The addition...
For each of the solutions described below, determine the pH range for the solution using the...
For each of the solutions described below, determine the pH range for the solution using the information given and the indicator chart Solution A Indicator Used alizarin yellow Indicator color Yellow bromthymol blue yellow methyl violet violet Range bear the 21 less than 7.6 leathen lib really them 5.1 Gooher the 3.2 bromcresol green green methyl red red The pH range for solution A is 3.2 7.6 Solution B Indicator Used methyl red Indicator color yellow Range leroth 67 alizarin...
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...
5. A rainwater sample shows a yellow color when tested with both methyl red and bromthymol...
5. A rainwater sample shows a yellow color when tested with both methyl red and bromthymol blue. What is the approxi. mate pH of the sample? Is it acidic, basic, or neutral? 6. Calculate the pH of a solution with [OH-] = 1.0 x 10-6
PLEASE EXPLAIN THE ANSWER Alizarin yel 16.16 If the pH is 8.0 at the equivalence point...
PLEASE EXPLAIN THE ANSWER
Alizarin yel 16.16 If the pH is 8.0 at the equivalence point for the titration of a certain weak acid with sodium hydroxide, what indicator might you use? (See Figure 15.10.) pH range for color change Indicator name H ii + + 0 Methyl violet yellow violet Thymol blue (acidic range) red yellow Bromphenol blue yellow blue Methyl orange red yellow Bromcresol green yellow blue Methyl red rad yellow • yellow blue Brumthymol blue Thymol blue...
Question 1 What color will phenolphthalein appear in an acidic solution? Colorless Pink Yellow Question 2...
Question 1 What color will phenolphthalein appear in an acidic solution? Colorless Pink Yellow Question 2 What is the net ionic equation for the reaction of aqueous copper (II) nitrate and zinc metal? Cu2+ + Zn(s) → Zn(s) + Cu2+ NO3- + Zn (s) → Zn(NO3) (s) Cu2+ + NO3- → Cu(NO3)(s) Cu2+ + Zn (s) → Zn2+ + Cu (s)
An unknown solution gives the following sequential results for color when indicators are 3. added (shown...
An unknown solution gives the following sequential results for color when indicators are 3. added (shown below). Using the corresponding color ranges from the table on page 2, estimate the approximate pH range of this unknown solution. Explain. नी (cnge 3.0-46 Bluish purple Bromphenol blue: 4.2-6.8 Yellow Methyl Red: 60-76 Blue Bromothymol Blue: 2.3-10-0 Colorless Phenolpthalein: 2. Sketch a titration curve for the titration of 50 mL of 0.10 M NaOH as 0.1 M HCl is added to it. Label...
EXP #9:Pre-Lab answer question 3, attached below is page two to reference! Instructor Name: Student Name:...
EXP
#9:Pre-Lab
answer question 3, attached below is page two to
reference!
Instructor Name: Student Name: 3. An unknown solution gives the following sequential results for color when indicators are added (shown below). Using the corresponding color ranges from the table on page 2, estimate the approximate pH range of this unknown solution. Explain. Bluish purple Bromphenol blue: Yellow Methyl Red: Blue Bromothymol Blue: Colorless Phenolpthalein: For a titration, pure indicators are used because the goal is to use an...
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?...
Questions: To determine the pH of an unknown solution, a student uses adds 10 drops of...
Questions: To determine the pH of an unknown solution, a student uses adds 10 drops of red cabbage indicator to the solution, but the solution remains colorless. Can the student determine if the solution is acidic, basic, or neutral? Explain. 1.
Use the Table 7.1, estimate the pH of following solutions. The colors of the 4 indicators...
Use the Table 7.1, estimate the pH of following solutions. The colors of the 4 indicators in the solution are given. Explain your answer a. Solution A 2. 3. Make studie acid s you g your pre-l thymol blue: yellow methyl orange: yellow methyl red: orange bromothymol blue: yellow Range of pH b. Solution B thymol blue: yellow methyl orange: yellow methyl red: yellow bromothymol blue: blue Range of pH Row C: methyl red Row D: bromthymol blue 4. Swirl...
For each of the solutions described below, determine the pH range for the solution using the information given and the indicator chart Solution A Indicator Used alizarin yellow Indicator color Yellow bromthymol blue yellow methyl violet violet Range bear the 21 less than 7.6 leathen lib really them 5.1 Gooher the 3.2 bromcresol green green methyl red red The pH range for solution A is 3.2 7.6 Solution B Indicator Used methyl red Indicator color yellow Range leroth 67 alizarin...
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...
5. A rainwater sample shows a yellow color when tested with both methyl red and bromthymol blue. What is the approxi. mate pH of the sample? Is it acidic, basic, or neutral? 6. Calculate the pH of a solution with [OH-] = 1.0 x 10-6
PLEASE EXPLAIN THE ANSWER
Alizarin yel 16.16 If the pH is 8.0 at the equivalence point for the titration of a certain weak acid with sodium hydroxide, what indicator might you use? (See Figure 15.10.) pH range for color change Indicator name H ii + + 0 Methyl violet yellow violet Thymol blue (acidic range) red yellow Bromphenol blue yellow blue Methyl orange red yellow Bromcresol green yellow blue Methyl red rad yellow • yellow blue Brumthymol blue Thymol blue...
An unknown solution gives the following sequential results for color when indicators are 3. added (shown below). Using the corresponding color ranges from the table on page 2, estimate the approximate pH range of this unknown solution. Explain. नी (cnge 3.0-46 Bluish purple Bromphenol blue: 4.2-6.8 Yellow Methyl Red: 60-76 Blue Bromothymol Blue: 2.3-10-0 Colorless Phenolpthalein: 2. Sketch a titration curve for the titration of 50 mL of 0.10 M NaOH as 0.1 M HCl is added to it. Label...
EXP
#9:Pre-Lab
answer question 3, attached below is page two to
reference!
Instructor Name: Student Name: 3. An unknown solution gives the following sequential results for color when indicators are added (shown below). Using the corresponding color ranges from the table on page 2, estimate the approximate pH range of this unknown solution. Explain. Bluish purple Bromphenol blue: Yellow Methyl Red: Blue Bromothymol Blue: Colorless Phenolpthalein: For a titration, pure indicators are used because the goal is to use an...
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?...
Questions: To determine the pH of an unknown solution, a student uses adds 10 drops of red cabbage indicator to the solution, but the solution remains colorless. Can the student determine if the solution is acidic, basic, or neutral? Explain. 1.
Use the Table 7.1, estimate the pH of following solutions. The colors of the 4 indicators in the solution are given. Explain your answer a. Solution A 2. 3. Make studie acid s you g your pre-l thymol blue: yellow methyl orange: yellow methyl red: orange bromothymol blue: yellow Range of pH b. Solution B thymol blue: yellow methyl orange: yellow methyl red: yellow bromothymol blue: blue Range of pH Row C: methyl red Row D: bromthymol blue 4. Swirl...
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