Homework Answers
Red cabbage contains a water soluble pigment called anthocyanin that changes colour when it mixed with an acid or base. The pigment turns red in acidic environment and turns bluish green in basic or alkaline environment. So as the colour of the solution remain unchanged after addition of 10 drops of red cabbage indicator, the solution is a neutral solution.
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Questions: To determine the pH of an unknown solution, a student uses adds 10 drops of...
174 Problems and questions 1. Compare and contrast the three methods used to test pH (red...
174 Problems and questions 1. Compare and contrast the three methods used to test pH (red cabbage indicator, pH paper, and a pH meter). Did they give similar results? Which is the most accurate? Explain. 2. The hydroxide ion concentration of a solution is 2.5 x 10 M. What is the hydronium ion concentration? a) What is the pH? b) Is the solution acidic, basic, or neutral? c) 3. A few drops of HCl are added to two solutions, A...
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?
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. pH estimation and explanation There are three methods to determine pH (Table 4). For...
Part A. pH estimation and explanation There are three methods to determine pH (Table 4). For litmus strips, red litmus paper turns blue in basic solution but stays red in acidic solution, while blue litmus paper turns red in acidic solution but stays blue in basic solutions. For the liquid universal indicator and pH 1-14 test papers, compare its color with the scale provided on the package to determine pH. When using litmus strips and pH 1-14 paper, use a...
I need help creating a flowchart on a unknown 89 Chart of Unknown Test and the...
I need help creating a flowchart on a unknown 89 Chart of Unknown Test and the Result #89 Name of Test What does it test? Positive result appears as: negative results appears as: Unknown #89 result: Gram Stain Reaction Cell envelope morphology Violet-blue Red Negative (pink) Cell morphology (shape: coccus, bacillus, or spirillum) Cell shape Bacillus (Rod shaped) Cell Arrangement Cell size or length Single Bacillus Pigment Cell envelope morphology Pink Oxygen Requirement If cell needs oxygen for respiration Growth...
Determine the pH of a solution that has an [H+] concentration of 5.4 x 10-4M. Is...
Determine the pH of a solution that has an [H+] concentration of 5.4 x 10-4M. Is this substance acidic, basic, or neutral? Explain how you determined that. What are some properties this substance likely possesses, based on its classification?
A student capped a test tube containing 10 drops of phycocyanin solution and shook it vigorously...
A student capped a test tube containing 10 drops of phycocyanin solution and shook it vigorously for 60 seconds. Afterward, the solution was colorless. Explain how the shaking caused this result.
9. Determine the (OH), pH, and pOH of a 0.15 M ammonia solution 10. Determine if...
9. Determine the (OH), pH, and pOH of a 0.15 M ammonia solution 10. Determine if each solute will form a solution that is acidic, basic, or pH-neutral. a. FeCl3 b. NaF C. CaBr2 d. NH4Br e. C6H5NH3NO2 Chapter 15
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...
The pH of a solution determines the form of an amino acid. Determine which condition corresponds...
The pH of a solution determines the form of an amino acid.
Determine which condition corresponds to each given structure of
phenylalanine.
Choose Neutral solution, Acidic solution, or Basic solution
Choose Neutral solution, Acidic solution, or Basic solution
Choose Neutral solution, Acidic solution, or Basic solution
И -NH3 -NH3 HO Н -NH₂
174 Problems and questions 1. Compare and contrast the three methods used to test pH (red cabbage indicator, pH paper, and a pH meter). Did they give similar results? Which is the most accurate? Explain. 2. The hydroxide ion concentration of a solution is 2.5 x 10 M. What is the hydronium ion concentration? a) What is the pH? b) Is the solution acidic, basic, or neutral? c) 3. A few drops of HCl are added to two solutions, A...
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. pH estimation and explanation There are three methods to determine pH (Table 4). For litmus strips, red litmus paper turns blue in basic solution but stays red in acidic solution, while blue litmus paper turns red in acidic solution but stays blue in basic solutions. For the liquid universal indicator and pH 1-14 test papers, compare its color with the scale provided on the package to determine pH. When using litmus strips and pH 1-14 paper, use a...
A student capped a test tube containing 10 drops of phycocyanin solution and shook it vigorously for 60 seconds. Afterward, the solution was colorless. Explain how the shaking caused this result.
9. Determine the (OH), pH, and pOH of a 0.15 M ammonia solution 10. Determine if each solute will form a solution that is acidic, basic, or pH-neutral. a. FeCl3 b. NaF C. CaBr2 d. NH4Br e. C6H5NH3NO2 Chapter 15
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...
The pH of a solution determines the form of an amino acid.
Determine which condition corresponds to each given structure of
phenylalanine.
Choose Neutral solution, Acidic solution, or Basic solution
Choose Neutral solution, Acidic solution, or Basic solution
Choose Neutral solution, Acidic solution, or Basic solution
И -NH3 -NH3 HO Н -NH₂
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